E.g deep sea volcanic - vents = high pressure and temps, highly developed senses (not sight)
Antarctic - little heat lost, thick layer of insulating fat, may have waterproof feathers, huddle in large packed groups
High altitudes - Acclimatise = progressively icreasing altitude, produces extra red blood cells, to capture more oxygen.
Pollution=waste substances from human activies e.g fossil fuels
Air pollution: Hydrocarbons (combustion), CO2 (vehicles and greenhouse gas, sulphur dioxide (acid rain), carbon monoxide (vehicle exhaust & heavy industries)
Water pollution: Sewage, bacteria feed on it and use up oxygen living things die, nitrates washed into streams etc plants grow excessively, phosphates in fertillisers contributes to eutrophication.
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