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sustainability
chapter 27
| Question | Answer |
|---|---|
| sustainability | conservation of the balance of the worlds ecology indefinitely |
| the three pillars of sustainability are | environmental, economic and social |
| a fuel is | a substance that burns in oxygen to produce heat |
| fossil fuels are | coal oil and gas |
| natural gas is mainly | methane |
| hydrocarbons are made only of carbon and hydrogen | |
| when hydrocarbons burn | carbon dioxide water and energy are made |
| the greenhouse effect is | the natural trapping of the suns energy by the atmosphere |
| extra warming that results from an enhanced greenhouse effect is called | global warming |
| biofuels are made from plants such as | rapeseed oil and sunflower oil |
| bitumen is used for | taring roads |
| kerosene is used for | central heating |
| LPG stands for | liquified petroleum gas |
| sewage refers to | human waste |
| algal bloom | cause dissolved oxygen levels in water to fall |