Many people are worried about the state of the planet, and the effects of ____ (an increase in world temperatures, caused by an increase in ____ around the Earth). A growing human population is putting pressure on the Earth's ____ (things that exist in nature and can be used by people, for example iol, trees, etc.) like food and water. Also, a lot of human activity is ____ (causes damage), either because it causews pollution (dirty air, water or land), or because it ____ (damages the air, water and land so badly that it might not recover). Some of the most common causes of damage are: - ____ (chemicals and unwanted materials which factories throw away) - ____ and ____ - ____(which contain CFCs - a chemical which damages the ozone layer) - ____ - which increases the amount of carbon dioxide in the atmosphere. Environmentalists try to ____ the environment (keep it safe from harm) by encouraging people to change the way they live (recycling more, using environmentally-friendly or "green" products which do not damage the environment, wasting less, etc). and persuading governments to take environmental issues more seriously.

Ecology

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