Climate and climate change

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Across
  1. 2. it consists in the protection of our environment
  2. 5. fish habitat that is disappearing
  3. 7. the rise in water level will make some of them disappear
  4. 8. it increases every year
Down
  1. 1. everyone should do some of these
  2. 3. these are the consequences of climate change
  3. 4. in 2 words, something which is melting currently
  4. 6. It is considered as a layer. Its chemical formula is "O₃"