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Population and pollution

Population - of the world is growing at an ever increasing rate - because the birth rate exceeds the death rate - poor developed countries eg South Africa and India have a large population.  The developed countries burn the most fossil fuels eg USA + Europe  Pollution caused by a person or an organision what they leave is called their carbon footprint - there are many types of pollution - carbon dioxide from burning fossil fuels, the greenhouse effect and global warming - Water and air can be measured using direct methos of indicator organisims - lichen - blood worm - mayflower lava

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Population and pollution

Population - of the world is growing at an ever increasing rate - because the birth rate exceeds the death rate - poor developed countries eg South Africa and India have a large population.  The developed countries burn the most fossil fuels eg USA + Europe  Pollution caused by a person or an organision what they leave is called their carbon footprint - there are many types of pollution - carbon dioxide from burning fossil fuels, the greenhouse effect and global warming - Water and air can be measured using direct methos of indicator organisims - lichen - blood worm - mayflower lava

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Sustainability

Conveservation - looking after or perserving the variety of plants, animals and the habitats that they live in, this is important because it prevents damage to food chains, protects our food supply, protects plants and animals that might be useful for medicinal uses - proects organisms and havitats that people like to visit and study - when a species is at risk of extinction it means that they number falls below creital levels - remember when preserving a species to think of the size of the population, variation suitable habitats and how much competion there is from other species - Sustainable development - means taking enough resources from the enviroment for current needs, so leave some fish to carry on breeding, find other forms of energy - renewable - think how to dispose of waste products

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Susustainability

Whale conservation - whales are used for - skins are made into belts, shoes, handbags and luggage - sinews are used in tennis rackets - oil is taken from bones and the skin to make high-grade alchohol, shoe cream, lipstick, ointment, crayons, candles, fertiliser, soap and animal feed - whalemeat is used in pet food and human food - teeth used for button, piano keys and jewellery - ambergris is used in perfumes  -  some whales are kept in captivity for research or captive breeding or just for our entertainment. It is difficult to set up whale banning but some countries have it in place, other countries want the ban lifted.  Some scientists think it is ok to kill some whales for research purposes.

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