greenhouse gases - gases which cause the green house affect, especially carbon dioxide , fish stocks - the number of fish, tackle - to try to deal with a problem, pollution - damage caused to water, air, etc by harmful substances or waste, irreparable  - Irreparable damage, harm, injury, etc is so bad that it can never be repaired., fossil fuels - a fuel such as coal or oil that is obtained from under the ground, damage - to harm or break something, deplete - to reduce the amount of something, especially a natural supply, devestating - causing a lot of damage or destruction, famine - a long period when people living in a particular area do not have enough food, and many of them suffer and die, flood - If a place floods or is flooded, it becomes covered in water., disaster - something that causes a lot of harm or damage,

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