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Great damage or loss of life caused by natural events (like earthquakes) or human accidents. It corresponds to 'disaster' or 'calamity'.

Unwanted or unusable materials that are discarded after use. It is the formal academic term for 'waste' or 'trash'.

The temperature of the air in the atmosphere. It refers to how hot or cold the weather is.

The act of using up or exhausting resources, energy, or time. It implies a reduction in the available amount.

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration; carbon dioxide (CO2).

The quality of water, specifically in terms of its chemical, physical, and biological characteristics, usually with respect to its suitability for a particular purpose.

The act of damaging, breaking, or spoiling the value, condition, or reputation of something.

The act of damaging something so badly that it cannot be repaired or no longer exists.

The gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect.

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