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ENVIRONMENT

Across
substantial reduction in the population of an area.
an overflow of a large amount of water beyond its normal limits
The gradual wearing away of soil
The process of releasing gases into the atmosphere, often from vehicles
the process by which fertile land becomes desert
the natural home or environment of an animal, plant, or other organism.
The variety of life on Earth
The gas that contributes to the greenhouse effect
Periods of prolonged lack of rainfall
Down
A significant threat to aquatic ecosystems caused by industrial emissions.
the condition where more people are located within a given space than is considered
The large-scale clearing of forests
Harmful substances in the air or water
The use of chemicals to enhance crop growth
unwanted or unusable material, substances, or by-products.
rubbish such as paper, cans, and bottles left lying in an open or public place.