1. The world’s ____doubled. 2. Mankind is driving many species to ____ 3. Trees can help because they absorb ____ 4. There’s a high rate of ____ in Chernobyl Region. 5. Pollution is making a hole in ____ 6. The Dnipro and the Dniester are the most polluted ____ bodies in Ukraine. 7. People were exposed to the deadly level of ____ in Chernobyl zone before the evacuation. 8. About half of the ____ used in the field in Ukraine are washed off into the river. destruction population population extinction

Ecological problems

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