C.14 The Earths Resources

• development that meets the needs of the current generation • without compromising the ability fo the future generation to meet their owns

• warmth • shelter • food • transport

• Wool • Cotton • Wood • Rubber

• Plastic • Polyester • replaces cotton

• One that is being used up faster than it is being replenished • Crude oil • Fossil fuel • Ores

• ones that can be replenished at the same or faster rate than they are being used • solar • wind • bio fuels • fermentation of glucose to form ethanol • glucose –> ethanol + CO2 • anaerobic, yeast, 40c

water that is safe to drink

• Must have low levels of dissolved salts and microbes • Salt can be harmful to human • Microbes can cause illness

• Source of freshwater • river • lake • borehole • Pass the water through the filter bed to remove solids • Steralise • Chlorine • UV • Ozone (O3) • in order to destroy any harmful microbes

• Removal of salt • Some countries do not have access to fresh water (UAE)

• Distillation • Reverse osmosis • cost is high

• Heat to 100 a concincal flask with salty water • Evaporate the water • The gas travels along the delivery tube • The tube is a lower temperature so the gas condenses • Into pure water • The boiling tube with pure water must be in a beaker full of iced water

• evaporate all the water and see if a solid remains • measure the boiling point • if it is an extact value = pure

• urban lifestyles and industrial processes • produce waste water • that needs to be cleaned before being released into the environment

• organic matter (poo) • contain harmful bacteria • high levels of nitrogen compounds can harm aquatic ecosystems

• harmful chemicals • toxic metal compounds

• fertalisers • pesticides • organic matter can disrupt sensitive ecosystems

Screen • to remove solid and large particles Sedimentation • allows tiny particles to settle • separating the water into sewage sludge and effluent • liquid that stays on top Sludge • Digested anaerobically • used for NPK fertalisers • Burned as Biogas Effluent • digested aerobically

• Extraction and processing of raw materials • Manufacteuring • packaging • transport • Use during life • can it be reused • Disposal EMU D(ani)

• requires SO MUCH energy for a really little amount of water • expensive so only used when no fresh water

• metal • glass • building materials • clay ceramics • plastics

• they will run out • quarrying and mining causes environmental impacts

• glass bottles • clean and reuse

• crushed • melted into other products