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The quality of being able to continue over a long period of time, especially without depleting natural resources.

Able to be maintained at a certain rate or level, especially without depleting natural resources or damaging the environment.

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

To release or emit substances like gas, light, heat, or energy into the outside world.

The physical world including plants, animals, landscapes, and other features and products of the earth, as opposed to humans or human creations.

The weather conditions prevailing in an area in general or over a long period. This is a core word for IELTS Task 2 essays on global warming and nature.

Food required for survival, especially in the context of supply, security, or resources for a population.

The act of dividing or separating things that were combined or connected. It is frequently used in the context of waste management or scientific processes.

The science or practice of farming, including cultivation of the soil and the rearing of animals. It is often discussed in relation to food security and climate change.

The act of keeping someone or something safe from harm, damage, or loss.