Climate change

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Across
  1. 1. Meteorological phenomenon of severe storms
  2. 5. Permanently frozen ground
  3. 6. Consequence of melting ice, which may lead to the disappearance of some islands (2 words, no space)
  4. 7. Big animals endangered by melting ice (2 words, no space)
  5. 9. degradation of the environment by human activities in particular
  6. 10. Phenomenon in the atmosphere that traps heat and warms the planet (2 words, no space)
  7. 12. International climate conference, to make crucial decisions on environment
Down
  1. 2. Molecule produced in large quantities mainly responsible for global warming (2 words, no space)
  2. 3. Energy like hydrocarbons that take a very long time to form in the ground (2 words, no space)
  3. 4. A system for producing electricity with less pollution, such as solar panels, wind turbines... (2 words, no space)
  4. 8. Long period without rainfall
  5. 11. Overflow of a large amount of water beyond its normal limits