Humans use the Earths resources to provide warmth , shelter , food , clothing & transport
Natural resources, supplemented by agriculture , provide food , timber , clothing & fuels
Finite resources from the earth, oceans and atmosphere are processed to provide energy & materials
Difference between finite & renewable resources
Finite resources from the earths crust oceans & atmosphere will one day run out
Renewable resources are those which will not run out
Potable water, which is water that is safetodrink
Portable water is not pure water in the chemical sense, because it contains dissolve substances
In the UK, rain provides water with low levels of dissolved substances (fresh water) in ground in lakes.
How is potable water produced using Fresh water
Choose an unappropriate fresh water
Passing the water through filter beds
Sterilising
How is possible water produced using this desalination
desalination can be done by distillation or by processes that use membranes such as reverse osmosis. These processes require large amounts of energy
Stages of life cycle assessment
Raw materials
Manufacturer
Use
Disposal
Difference between potabe water and pure water
Potbale water Is not pure as it contains dissolved substances, whereas pure water does not contain any other substances
Waste water require treatment before being released into the environment
Three types of waste
Sewage waste (domestic waste) household waste which goes down to sewage
Agricultural waste animal waste or nutrient run off
Industrial waste factories which make of use chemicals
sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.
