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1. There is a list of some common
   [ ] issues.
2. The industrial emissions are the main cause of
   [ ].
3. People should
   [ ] nature for future generations.
4. [ ] resources play one of the leading roles in our ecosystem.
5. Tornadoes can
   [ ] homes, plants, villages and even mountains.
6. We should follow
   [ ] balance to prevent natural disasters.
7. There are so many
   [ ] types of pollution, such as land pollution, water pollution or air pollution.
8. People have to make some
   [ ] to the environment to have a better life in the future.
9. Try to not drive a long
   [ ] to prevent air pollution.
10. Some people think that
    [ ] makes no sense in European countries. They don't understand why we should do that.
11. Social
    [ ] in ecological issues is so miserable. Our society doesn't want to make any
    [ ] in recycling plastic waste.
12. It would be a major
    [ ] if we could increase the number of ecological
    [ ].
13. The
    [ ] of energy and fossil fuels will become lower in 3 years.
14. Volunteering projects and reproduction of
    [ ] species will be a great
    [ ] to local ecological communities.
15. Many environmental organisations are under
    [ ] because of
    [ ] plants which don't want to follow some European standards.