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1 Contaminated water causes approximately 80% of infection diseases in the world.2 Today we need alternative source of energy3 Governments generally warn the public before major health outbreaks occur.2acid rains, tropical rainforest, exhaust pollution, exhaust fumes, ozone layer, nuclear energy, traffic jams, natural pollution, natural resources, air gases, greenhouse effect, solar enegry, public transport, renewable resources31 - b, 2 - f, 3 - h, 5 - c, 6 - g, 7 - a, 8 - i, 9 - e41 changes 2 polar 3 habitat 4 recent 5 currently 6 spills 7 pollution 8 creatures 9 warming 10 conditions 11 reports 12 destruction 13 enormous 14 planet