Summary Cambridge Igcse Environmental Management Unit 4 (Water And It's Management)

Biofuels {Ans: Biomass burned and should be renewable as carbon released should be offset by new forest as it grows}Sustainable development {Ans: Considers the needs of future generation as well as those of people today, aim for coming generations to have the same conditions and resources on earth as it does now}Formation of metamorphic rocks {Ans: Rocks are changed by heat and pressure in the earth's crust}Positive impacts of mining on people {Ans: Jobs, improves economy, income that can be used for improvements in facilities, infrastructure}Examples of igneous rocks {Ans: Granite, basalt}Subsurface mining, deep mining, shaft mining {Ans: - vertical shaft sunk down to mineral bearing layer - horizontal tunnel made following mineral layer - miners/machine extract minerals - loose rock brought out of mine and pile into waste heaps - minerals transported}Geothermal power {Ans: - cold water pumped down into ground - water heated by hot rocks - hot water piped up - steam turns turbines to generate electricity - only where there is volcanic activity}Examples of metamorphic rocks {Ans: Marble, slate}Managing the impact of mining {Ans: - safe disposal of mining waste - land restoration: soil improvement, biomediation, tree