WRITE AN ESSAY ON A MAIN POLLUTION SOURCE IN THE EARTH. 1.WHICH IS THE SOURCE OF THIS POLLUTION? WHEN DID IT HAPPEN? WHICH ARE THE AREAS THAT ARE MORE AFFECTED? WHICH ARE THE CONSEQUENCES FOR THE HUMAN AND THE ECOSYSTEMS? 2. DIFFERENt WAYS TO DETECT AND RECOVER THE AREAS AFFECTED? GIVE EXAMPLES TO EXPLAIN IT. 3. HOW WILL IT BE IN THE FUTURE?