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To be completely used up or exhausted, so that nothing remains. Often used for natural resources, funds, or human energy.

Not occurring naturally; created, caused, or influenced by human activity or intervention.

A long-term change in the average weather patterns that have come to define Earth's local, regional, and global climates.

Energy from a source that is not depleted when used, such as wind or solar power.

The presence in or introduction into the air of a substance which has harmful or poisonous effects.

The practice of protecting the natural environment by individuals, organizations, and governments. Its objectives are to conserve natural resources and the existing natural environment.

To create or foster an atmosphere, environment, or physical space. It can refer to building a physical park or creating a certain social mood.

Able to be used again or replaced naturally so that it is never finished or used up; specifically referring to energy sources.

To emit, discharge, or release substances (like gas or waste); also used metaphorically to produce talented people.

To reduce or cut down the quantity, volume, or size of something, often used for budgets, personnel, or emissions.