1) The climate change is the heating of the earth. Due to more and more pollution the co2 level is much higher. This is causing global warming. The global temperature is rising and as a result in the arctic the ice is slowly melting, causing the sea levels to rise.
2) To prevent this from happening we could switch to electric cars fore they do no use co2 . Lots more needs to be done to prevent climate change like using less nuclear power plants and more wind turbines and solar panels.
Bon j'espère que sa te sufit :)