极端

Involving methods that do not use up or destroy natural resources; able to be maintained at a certain rate or level over a long period.

To be likely to cause harm or damage to something; a suggestion that something unpleasant will happen.

To use up resources, energy, or time. In academic writing, it often refers to the consumption of natural resources or the energy expenditure of a system.

Sources of power, such as fuel or electricity, used to provide light and heat or to work machines.

The system of vehicles and pedestrians moving along roads or through the air; transportation. It frequently appears in discussions about urban planning and pollution.

To be completely used up or run dry; typically used for resources, water, or even creativity and energy.

Relating to natural resources, such as solar energy or wind power, that are not depleted when used. It describes materials or energy sources that can be replaced naturally.

To save or economize on resources like money, time, water, or energy. It implies using things wisely and avoiding waste.

The general weather conditions prevailing in an area over a long period. In IELTS, it is almost always discussed in the context of 'change' or 'global warming'.

To make something continue in the same way or at the same level as before. It often refers to order, living standards, or physical states.