공생
공생 in 30 Seconds
- A noun meaning symbiosis or mutually beneficial coexistence.
- Rooted in Hanja: 共 (together) + 生 (life).
- Used in biology, economics, and social contexts.
- Implies mutual dependence and long-term sustainability.
The Korean word 공생 (gongsaeng) is a profound term that translates most directly to 'symbiosis' or 'coexistence' in English. Rooted in the Hanja characters 共 (gong) meaning 'together' or 'common' and 生 (saeng) meaning 'life' or 'living,' it literally describes the state of 'living together.' While it originated in the biological sciences to describe how different species interact, its usage in modern Korean has expanded significantly into the realms of economics, social justice, and international relations. In a world that is increasingly interconnected, understanding '공생' is essential for grasping how Koreans view mutual benefit and collective survival.
- Biological Symbiosis
- In its most literal sense, it refers to the interaction between two different organisms living in close physical association. This includes mutualism, where both benefit, such as the relationship between bees and flowers.
Beyond biology, '공생' is frequently used to describe a 'win-win' situation in business or society. When a large corporation and a small startup work together to create a new market, they are said to be in a '공생 관계' (symbiotic relationship). This term carries a more positive, active connotation than '공존' (coexistence), which can sometimes imply merely existing in the same space without necessarily helping one another. '공생' implies a functional link where the survival or prosperity of one is tied to the other.
자연계에서는 다양한 생물들이 서로 공생하며 생태계를 유지합니다. (In nature, various organisms live in symbiosis to maintain the ecosystem.)
In contemporary political discourse, you might hear about '공생의 경제' (economy of symbiosis), referring to policies aimed at reducing the gap between the rich and the poor so that the entire society can thrive together. It suggests that if one part of the system fails, the whole system is at risk. This holistic view is a key cultural nuance of the word. It is not just about being nice; it is about the structural necessity of mutual support. Whether discussing the relationship between humans and AI or the delicate balance of a coral reef, '공생' provides the linguistic framework to discuss how disparate parts form a functional whole.
- Economic Context
- In business, '공생' often appears in the context of 'win-win' strategies where competitors or partners find common ground to expand the entire industry rather than fighting over a shrinking pie.
대기업과 중소기업의 공생은 국가 경제 발전의 핵심입니다. (The symbiosis between large corporations and small-to-medium enterprises is the key to national economic development.)
Finally, the word is often contrasted with '기생' (parasitism). While '공생' involves mutual benefit, '기생' involves one side benefiting at the expense of the other. This contrast is used frequently in social criticism to describe unfair power dynamics. By choosing the word '공생,' a speaker is often advocating for a more ethical and sustainable way of living and working together.
Using 공생 (gongsaeng) correctly requires understanding its grammatical flexibility. As a noun, it often pairs with the verb 하다 (hada) to form 공생하다, meaning 'to live in symbiosis.' It can also be used as a modifier by adding -의 (of) or by directly preceding another noun to form compound terms like 공생 관계 (symbiotic relationship). Because it is a Sino-Korean word, it carries a formal and academic tone, making it suitable for news reports, essays, and professional discussions.
- Noun + Verb Form
- The most common way to use it is with '하다'. Example: '인간과 자연은 공생해야 한다' (Humans and nature must coexist symbiotically).
When describing relationships, '공생' is almost always followed by '관계' (relationship). You will see this in biology textbooks describing the relationship between a clownfish and an anemone, but you will also see it in political science papers discussing the relationship between different political parties or nations. The nuance is that neither party can thrive—or perhaps even survive—without the other. This makes it a much stronger word than '친하다' (to be close) or '협동하다' (to cooperate).
개미와 진딧물은 서로의 생존을 돕는 공생 관계에 있습니다. (Ants and aphids are in a symbiotic relationship that helps each other's survival.)
Another sophisticated use of '공생' is in the phrase '공생의 길' (the path of symbiosis). This is a metaphorical expression often used by leaders or environmentalists to suggest a sustainable future. It implies that current competitive or destructive behaviors must be replaced by a system of mutual support. For example, '우리는 환경과 공생의 길을 찾아야 합니다' (We must find a path of symbiosis with the environment). Here, '공생' acts as a guiding principle rather than just a biological description.
- Compound Nouns
- Common compounds include '공생 발전' (symbiotic development) and '공생 경제' (symbiotic economy). These are frequently used in government policy documents.
디지털 시대에는 기계와 인간의 공생이 필수적입니다. (In the digital age, the symbiosis of machines and humans is essential.)
In more advanced contexts, you might see '공생' used with the verb '도모하다' (to promote or aim for). '공생을 도모하다' means to actively work toward creating a symbiotic state. This is a very high-level expression often found in business strategy or international diplomacy. It suggests an intentional effort to move away from zero-sum competition toward a mutually beneficial arrangement. Understanding these patterns allows you to use '공생' not just as a vocab word, but as a tool for complex conceptual thought in Korean.
While 공생 (gongsaeng) might seem like a technical term, you will encounter it in surprisingly varied contexts in daily Korean life. One of the most common places is in documentary narrations. Korean nature documentaries frequently use this word to describe the intricate balance of the animal kingdom. If you are watching a program about the ocean or the forest on KBS or MBC, listen for '공생 관계' as the narrator explains how different species support one another. It sets a tone of wonder and interconnectedness.
- News and Media
- In economic news reports, '공생' is used to discuss corporate social responsibility (CSR) or the relationship between major conglomerates (Chaebols) and their suppliers.
Another major venue for this word is in political speeches. Politicians in Korea often use '공생' when they want to sound visionary or inclusive. They might talk about '국민과의 공생' (symbiosis with the citizens) or '남북 공생' (inter-Korean symbiosis). In these contexts, the word is used to evoke a sense of shared destiny. It moves the conversation beyond mere 'cooperation' to a deeper level of existential mutual dependence. If you are preparing for the TOPIK exam or reading editorial columns in the 'Chosun Ilbo' or 'Hankyoreh,' you will find '공생' used to argue for social safety nets and environmental protections.
이번 정책은 소상공인과 대형 마트의 공생을 목표로 하고 있습니다. (This policy aims for the symbiosis of small business owners and large supermarkets.)
In the business world, '공생' is a buzzword for sustainable growth. In corporate meetings or strategy presentations, you might hear about '공생 마케팅' (symbiotic marketing), where two companies with different strengths partner to reach a wider audience. This is distinct from a simple partnership because it implies that the two companies' ecosystems are becoming linked. For example, a smartphone manufacturer and a mobile app developer exist in a '공생' state; one cannot exist without the other's platform or content.
- Educational Context
- In school settings, teachers use '공생' to teach students about the importance of helping their peers and living harmoniously in a community.
우리는 기후 위기 시대에 지구와 공생하는 법을 배워야 합니다. (We must learn how to live in symbiosis with the Earth in the era of climate crisis.)
Lastly, in the tech world, you will hear this word regarding the relationship between AI and humans. Instead of the 'AI will replace humans' narrative, many Korean tech leaders advocate for '인간과 AI의 공생' (the symbiosis of humans and AI). This suggests a future where AI handles repetitive tasks while humans focus on creativity, creating a more productive whole. Whenever you hear a discussion about a future where different entities don't just survive but thrive together, '공생' is the word you are likely to hear.
One of the most frequent mistakes learners make with 공생 (gongsaeng) is confusing it with 공존 (gongjon). While both involve living together, they have different nuances. 공존 (coexistence) is a more neutral term; it simply means that two things exist at the same time and place without necessarily interacting. For example, '과거와 현대의 공존' (the coexistence of the past and present) is common. However, 공생 implies a functional, often biological or economic, dependency. If you say two animals '공존' it just means they are both in the forest. If you say they '공생,' it means they are helping each other survive. Using '공생' when no mutual benefit is involved can sound slightly strange or overly dramatic.
- Confusing with '협력'
- Learners often use '공생' where '협력' (cooperation) or '협동' (collaboration) would be more appropriate. '협력' is an action, while '공생' is a state of being or a relationship. You '협력' on a project, but you live in '공생'.
Another common error is the incorrect use of particles. Because '공생' describes a relationship between two parties, many students forget to use the '와/과' (and/with) particle or the '간의' (between) particle. For example, saying '인간 공생' is incomplete; it should be '인간과 자연의 공생' (symbiosis of humans and nature) or '인간 간의 공생' (symbiosis among humans). Without the connecting particle, the noun phrase lacks the necessary relational context that the word '공생' requires.
이 프로젝트는 공생입니다. (Incorrect)
이 프로젝트는 양측의 공생을 위한 것입니다. (Correct: This project is for the symbiosis of both sides.)
There is also a tendency to overuse '공생' in situations that are actually parasitic. In Korean, '기생' (parasitism) is the direct opposite. If one party is taking advantage of another, calling it '공생' is factually incorrect and might be seen as a misunderstanding of the social or biological dynamic. For instance, if a large company exploits a small one, it is not '공생' even if they work together; it is '갑질' (abuse of power) or '기생 관계' in a metaphorical sense. Being precise about the 'mutual benefit' aspect is key to using this word correctly.
- Register Errors
- Using '공생' in very casual, spoken conversation can sound 'too scholarly' (딱딱하다). It is better reserved for written work or formal presentations.
상생(win-win)과 공생은 비슷하지만, 상생은 주로 경제적 혜택에, 공생은 생존과 관계에 더 집중합니다.
Lastly, pay attention to the pronunciation. The '공' (gong) should have a clear 'o' sound, and the '생' (saeng) should be crisp. Because it is a short word, mispronouncing either syllable can lead to confusion with other words like '고생' (hardship/suffering). Saying '고생 관계' (relationship of suffering) instead of '공생 관계' (symbiotic relationship) would change the meaning entirely! Always ensure the 'ㅇ' final consonant in '공' is pronounced clearly.
To truly master 공생 (gongsaeng), you must be able to distinguish it from its close synonyms and related terms. The Korean language has several words for 'living together' or 'working together,' each with its own specific flavor and context. Choosing the right one shows a high level of linguistic sophistication. The most common alternative is 공존 (gongjon), which we've noted means 'coexistence.' While '공생' implies a deep, often necessary relationship, '공존' is broader and can apply to abstract ideas, like 'tradition and innovation coexisting.'
- 공생 vs. 상생 (Sangsaeng)
- '상생' is perhaps the most frequent synonym in business and politics. It literally means 'living together and helping each other grow.' While '공생' has a biological/existential root, '상생' is more focused on mutual prosperity and 'win-win' outcomes in human endeavors.
Another related term is 협력 (hyeollyeok). This is the general word for 'cooperation.' It is an active verb indicating that two parties are working together toward a specific goal. Unlike '공생,' which describes a continuous state or relationship, '협력' can be a one-time event. For instance, two countries might '협력' to catch a criminal, but they might seek '공생' to ensure long-term regional stability. If you are talking about a specific task, use '협력'; if you are talking about a long-term relationship of mutual dependence, use '공생.'
기업들은 상생 경영을 통해 지역 사회와 함께 성장합니다. (Companies grow together with local communities through 'win-win' management.)
In ecological contexts, you might also hear 합생 (hapsaeng) or 기생 (gisaeng). '합생' refers to the fusion of organisms, which is much rarer than '공생.' '기생,' as mentioned, is parasitism. In social contexts, '기생' is a very strong insult, implying that one person or group is a 'parasite' on society. Using '공생' is the positive aspiration that counters the negative reality of '기생.' When discussing multiculturalism, '공생' is often the preferred term because it suggests that different cultures don't just 'coexist' (공존) but actually enrich and support each other.
- Word Comparison Table
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- 공생: Mutual benefit, often essential for survival (Symbiosis).
- 공존: Existing in the same space/time (Coexistence).
- 상생: Mutual prosperity, often used in business (Win-win).
- 협동: Working together on a specific task (Collaboration).
다문화 사회에서는 서로의 문화를 존중하며 공생하는 자세가 필요합니다. (In a multicultural society, an attitude of living in symbiosis while respecting each other's culture is necessary.)
Finally, for very casual situations, you can simply use 같이 살다 (live together) or 서로 돕고 살다 (live helping each other). These phrases capture the essence of '공생' without the academic weight. However, if you are writing an essay, giving a speech, or discussing scientific or social theories, '공생' remains the most precise and powerful choice. It encapsulates a philosophy of life that values the collective over the individual, a core tenet of many Eastern thought systems.
Pronunciation Guide
- Pronouncing '공' like '고' (missing the 'ng' sound).
- Confusing it with '고생' (go-saeng) which means hardship.
Examples by Level
벌과 꽃은 공생해요.
The bee and the flower live in symbiosis.
'공생해요' is the polite present tense of '공생하다'.
우리는 같이 공생해요.
We live together in symbiosis.
'같이' means 'together', emphasizing the '공' (together) in '공생'.
나무와 새는 친구예요. 공생해요.
The tree and the bird are friends. They live in symbiosis.
Simple sentences connected to show a relationship.
바다 속 물고기들이 공생해요.
The fish in the sea live in symbiosis.
'바다 속' means 'inside the sea'.
서로 도와요. 공생이에요.
They help each other. It is symbiosis.
'공생이에요' uses the '이다' verb (to be).
개미와 진딧물은 공생해요.
Ants and aphids live in symbiosis.
'와' is the particle for 'and'.
이것은 공생 관계예요.
This is a symbiotic relationship.
'관계' means 'relationship'.
자연은 공생이 중요해요.
Symbiosis is important in nature.
'중요해요' means 'is important'.
악어와 악어새는 공생 관계에 있어요.
The crocodile and the Egyptian plover are in a symbiotic relationship.
'~에 있어요' means 'to be in [a state/place]'.
우리는 지구와 공생하는 법을 배워야 해요.
We must learn how to live in symbiosis with the Earth.
'~하는 법' means 'the way/how to do something'.
이 식물들은 서로 공생하며 자라요.
These plants grow while living in symbiosis with each other.
'~하며' means 'while doing' or 'and'.
공생은 서로에게 도움이 되는 것이에요.
Symbiosis is something that is helpful to each other.
'~에게 도움이 되다' means 'to be helpful to'.
동물들은 숲에서 공생하며 살아가요.
Animals live on in the forest while in symbiosis.
'살아가다' means 'to live on' or 'to lead a life'.
작은 회사와 큰 회사가 공생할 수 있어요.
Small companies and large companies can live in symbiosis.
'~ㄹ 수 있어요' means 'can' (possibility).
선생님은 공생의 중요성을 설명하셨어요.
The teacher explained the importance of symbiosis.
'~성' is a suffix that makes a noun abstract (importance).
이 책은 자연의 공생에 대한 이야기예요.
This book is a story about the symbiosis of nature.
'~에 대한' means 'about'.
인간과 기술의 공생은 미래 사회의 핵심입니다.
The symbiosis of humans and technology is the core of future society.
'핵심' means 'core' or 'key'.
대기업과 중소기업이 공생할 때 경제가 발전합니다.
The economy develops when large and small businesses live in symbiosis.
'~ㄹ 때' means 'when'.
환경 보호를 위해 자연과의 공생을 실천합시다.
Let's practice symbiosis with nature for environmental protection.
'~를 위해' means 'for the sake of'.
이 두 종의 생물은 아주 특별한 공생 관계를 맺고 있습니다.
These two species of organisms are forming a very special symbiotic relationship.
'관계를 맺다' is a set phrase meaning 'to form/establish a relationship'.
공생은 단순히 같이 사는 것 이상의 의미가 있습니다.
Symbiosis has a meaning beyond simply living together.
'~ 이상의' means 'more than' or 'beyond'.
우리는 이웃과 공생하며 평화롭게 살고 싶어 합니다.
We want to live peacefully while in symbiosis with our neighbors.
'~고 싶어 하다' is the third-person 'want to'.
도시와 농촌의 공생을 위한 정책이 필요합니다.
Policies for the symbiosis of cities and rural villages are necessary.
'필요합니다' means 'is necessary'.
그들은 서로의 이익을 위해 공생하기로 약속했습니다.
They promised to live in symbiosis for each other's benefit.
'~하기로 약속하다' means 'to promise to do'.
생태계의 균형을 유지하기 위해서는 공생 관계가 필수적입니다.
A symbiotic relationship is essential to maintain the balance of the ecosystem.
'필수적' means 'essential' or 'indispensable'.
이 회사는 협력사와의 공생 발전을 최우선 가치로 둡니다.
This company places symbiotic development with its partners as its top priority.
'최우선 가치로 두다' means 'to set as the highest priority value'.
다문화 사회에서 다양한 문화 간의 공생은 매우 중요한 과제입니다.
In a multicultural society, symbiosis between various cultures is a very important task.
'과제' means 'task' or 'challenge'.
인간의 이기심이 자연과의 공생 관계를 파괴하고 있습니다.
Human selfishness is destroying the symbiotic relationship with nature.
'이기심' means 'selfishness'.
디지털 플랫폼과 창작자는 공생 관계를 구축해야 합니다.
Digital platforms and creators must build a symbiotic relationship.
'구축하다' is a formal word for 'to build' or 'to establish'.
이 영화는 로봇과 인간이 공생하는 미래를 그리고 있습니다.
This movie depicts a future where robots and humans live in symbiosis.
'그리다' here means 'to depict' or 'to portray'.
전통 시장과 대형 마트가 공생할 수 있는 방안을 모색 중입니다.
We are seeking ways for traditional markets and large supermarkets to coexist symbiotically.
'모색 중이다' means 'to be in the middle of searching for'.
진정한 공생은 일방적인 희생이 아닌 상호 존중에서 시작됩니다.
True symbiosis starts from mutual respect, not one-sided sacrifice.
'~이 아닌' means 'not [A] but [B]'.
현대 자본주의 사회에서 진정한 공생의 가치를 실현하기는 쉽지 않습니다.
It is not easy to realize the value of true symbiosis in modern capitalist society.
'실현하다' means 'to realize' or 'to make happen'.
생물학적 공생의 원리를 사회 경제 시스템에 도입하려는 시도가 늘고 있습니다.
Attempts to introduce the principles of biological symbiosis into socio-economic systems are increasing.
'도입하다' means 'to introduce' or 'to adopt'.
기후 위기는 인류에게 지구와의 공생이라는 근본적인 질문을 던집니다.
The climate crisis poses a fundamental question of symbiosis with the Earth to humanity.
'질문을 던지다' means 'to pose/throw a question'.
정치적 이념의 차이를 넘어 국가의 이익을 위한 공생의 정치가 필요합니다.
Politics of symbiosis for the national interest is needed beyond differences in political ideology.
'~를 넘어' means 'beyond' or 'transcending'.
인간과 AI의 공생은 단순한 도구적 활용을 넘어선 존재론적 변화를 예고합니다.
The symbiosis of humans and AI foretells an ontological change that goes beyond simple instrumental use.
'예고하다' means 'to foretell' or 'to herald'.
지역 공동체의 붕괴를 막기 위해 주민들 간의 공생 네트워크가 강화되어야 합니다.
To prevent the collapse of local communities, the symbiotic network among residents must be strengthened.
'강화되다' means 'to be strengthened'.
이 학설은 진화의 원동력이 경쟁이 아닌 공생에 있다고 주장합니다.
This theory claims that the driving force of evolution lies in symbiosis, not competition.
'원동력' means 'driving force' or 'impetus'.
문화적 다양성은 사회적 공생을 풍요롭게 만드는 핵심 요소입니다.
Cultural diversity is a key element that enriches social symbiosis.
'풍요롭게 만들다' means 'to make rich/abundant'.
만물은 거대한 생태적 그물망 속에서 유기적인 공생 체계를 이룹니다.
All things form an organic symbiotic system within a vast ecological web.
'유기적' means 'organic' (interconnected).
기술 문명의 비대화는 자연과의 공생적 균형을 위태롭게 하고 있습니다.
The overgrowth of technological civilization is endangering the symbiotic balance with nature.
'비대화' means 'becoming oversized' or 'hypertrophy'.
공생 경제학은 무한 경쟁의 패러다임을 상호 의존의 패러다임으로 전환하고자 합니다.
Symbiotic economics seeks to shift the paradigm of infinite competition to one of interdependence.
'전환하고자 하다' means 'intends to switch/convert'.
인간 정신의 성숙은 타자와의 공생을 자아의 확장으로 인식하는 데서 비롯됩니다.
The maturity of the human spirit stems from perceiving symbiosis with others as an expansion of the self.
'~에서 비롯되다' means 'to originate from' or 'to stem from'.
지속 가능한 발전을 위해서는 자본과 노동의 공생적 파트너십이 담보되어야 합니다.
For sustainable development, a symbiotic partnership between capital and labor must be guaranteed.
'담보되다' means 'to be guaranteed' or 'to be secured'.
포스트 휴먼 시대의 공생은 기계와 생명의 경계를 허무는 새로운 철학을 요구합니다.
Symbiosis in the post-human era demands a new philosophy that breaks down the boundaries between machine and life.
'경계를 허물다' means 'to break down boundaries'.
우주적 관점에서 볼 때, 지구상의 모든 생명체는 운명 공동체로서 공생하고 있습니다.
Viewed from a cosmic perspective, all life forms on Earth are living in symbiosis as a community of destiny.
'운명 공동체' means 'community of shared destiny'.
진화 생물학에서 공생은 종의 분화와 다양성 확보에 결정적인 역할을 해왔습니다.
In evolutionary biology, symbiosis has played a decisive role in species differentiation and securing diversity.
'결정적인 역할' means 'decisive role'.
Common Collocations
Common Phrases
— To form or establish a symbiotic relationship.
두 회사는 공생 관계를 맺기로 했습니다.
— The value of symbiosis or living together.
우리는 공생의 가치를 잊지 말아야 합니다.
— The philosophy of symbiosis.
그의 정치는 공생의 철학에 기반하고 있습니다.
— A symbiotic system or framework.
자연은 정교한 공생 체계를 가지고 있습니다.
— To practice or put symbiosis into action.
이웃 사랑은 공생을 실천하는 첫걸음입니다.
— To pursue symbiosis.
우리는 환경과의 공생을 추구합니다.
— A model of symbiosis.
이 마을은 공생의 모델로 불립니다.
— The spirit of symbiosis.
공생의 정신으로 위기를 극복합시다.
— To threaten symbiosis.
오염은 해양 생태계의 공생을 위협합니다.
— Symbiotic evolution.
인간과 미생물은 공생적 진화를 해왔습니다.
Idioms & Expressions
— Where the needle goes, the thread follows. (Describes inseparable entities, like symbiosis).
그 두 사람은 바늘 가는데 실 가듯 항상 공생합니다.
Informal— Helping each other mutually.
우리 마을은 상부상조하며 공생하는 전통이 있습니다.
Formal— Good for the sister and good for the brother-in-law (Win-win).
이 계약은 누이 좋고 매부 좋은 공생의 기회입니다.
Informal— Cleaning the ditch and catching crayfish (Gaining two things at once).
이 사업은 환경도 살리고 돈도 버는 공생 사업입니다.
Informal— If the lips are gone, the teeth get cold (Interdependence).
협력사가 망하면 우리도 힘드니 공생해야 합니다.
Literary— To be in the same boat (Shared destiny).
우리는 이제 공생하는 한 배를 탄 사이입니다.
General— Even a piece of paper is lighter when lifted together.
공생의 정신으로 백지장도 맞들면 낫다는 것을 보여줍시다.
General— Affection must go for affection to come (Reciprocity).
공생 관계에서는 가는 정이 있어야 오는 정도 있는 법입니다.
General— It takes two hands to clap (Cooperation/Symbiosis).
공생은 혼자 하는 게 아니라 손뼉을 마주치는 것입니다.
General— A shrimp's back breaks in a whale fight (The danger of not having symbiosis/protection).
강대국들 사이에서 공생의 길을 찾는 것이 중요합니다.
GeneralWord Family
Nouns
Verbs
Summary
공생 (gongsaeng) is more than just 'cooperation'; it describes a vital, often necessary relationship where two different entities help each other survive and thrive. An example is the '공생 관계' (symbiotic relationship) between bees and flowers.
- A noun meaning symbiosis or mutually beneficial coexistence.
- Rooted in Hanja: 共 (together) + 生 (life).
- Used in biology, economics, and social contexts.
- Implies mutual dependence and long-term sustainability.
Example
대기업과 중소기업의 공생 방안을 모색해야 한다.
Related Content
More environment words
인위적
B2Not occurring naturally; created, caused, or influenced by human activity or intervention.
기후변화
B2A long-term change in the average weather patterns that have come to define Earth's local, regional, and global climates.
식량
B1Food required for survival, especially in the context of supply, security, or resources for a population.
지속되다
B1To last or continue for a certain period of time without stopping or changing significantly.
자연재해
B1A natural event such as a flood, earthquake, or hurricane that causes great damage or loss of life.
재생에너지
B2Energy from a source that is not depleted when used, such as wind or solar power.
보호하다
B1To keep safe from harm, injury, or loss; to guard or defend.
오염
B1The presence in or introduction into the environment of a substance which has harmful or poisonous effects.
대기
B1The envelope of gases surrounding the earth or another planet. It is essential for describing air pollution and environmental issues in IELTS.
친환경
B2Being friendly to the environment; practices that do not harm the ecological balance.