BIOL 111 Lecture 8: BIOL 111 week 8 pt 2
21 Dec 2018
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Biol 111: week 8- non-renewable energy resources pt(2) Natural gas: natural gas is often found above reservoirs of oil, a mixture of methane, ethane, propane, butane and small amount of hydrogen sulphide and other impurities, mostly methane. Formed when decomposing plant and animal matter are exposed to intense heat and pressure under the surface of the earth over millions of years. Disadvantages: non renewable resource, release co2 when burned, requires pipelines, requires expensive lng carriers. Sometimes burned off: amply supplies, high net energy yield, easy transportation. Coal formation: peat (not a coal)- partially decayed plant matter in swamps and bogs; low heat content, bituminous (soft coal)- extensively used as a fuel because of its high heat content and large. Disadvantages: amply supplies, high net energy yield, well developed mining technology, reduced air pollution. Severe land disturbance: air pollution, high co2 emission. Severe threat to human health: nuclear fission reaction- slow moving neutrons are absorbed by nuclei of uranium or plutonium.
