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4. 1a; 2c; 3d 4b.
5.
1. - Biodiversity threats. biodiversity loss. decline in amphibian populations. decline in insect populations.
-Climate change. global warming. runaway climate change.
-Coral reefs.
-Deforestation.
-Defaunation.
-Desertification.
-Ecocide.
-Erosion ...
2. Exposure to high levels of air pollution can cause a variety of adverse health outcomes. It increases the risk of respiratory infections, heart disease and lung cancer. Both short and long term exposure to air pollutants have been associated with health impacts. More severe impacts affect people who are already ill.
3. Each year, millions of acres of forest around the world are destroyed or degraded by fire. The same amount is lost to logging and agriculture combined. Fire is often used as a way to clear land for other uses such as planting crops.
4. I think so.
5. The world's forests are being consumed rapidly. Trees are cut down for paper and wood products, for cooking fuel, to clear land for development, and to expand farming areas. The land left behind is stripped not only of its trees, but the plants, animals, and insects that lived in that ecosystem as well. With no plant roots to hold it in place, valuable soil washes away with every rainfall and ends up in the rivers and streams upon which people depend for their water supply. In extreme cases, hundreds or thousands of people lose their homes or perish in landslides when deforested slopes become unstable.
6. Simple Things You Can Do to Help Protect the Earth:
Reduce, reuse, and recycle. Cut down on what you throw away.
Volunteer. Volunteer for cleanups in your community.
Educate.
Conserve water.
Choose sustainable.
Shop wisely.
Use long-lasting light bulbs.
Plant a tree.
7. Environmental Organizations:
Greenpeace, Center for Environmental Research and Conservation, Earth Island Institute, Earth Justice, Environmental Defense Fund, Fauna and Flora International ...