Using Resources Flashcards
When do humans use earth resources for
Warmth
shelter
food
transport
What do natural resources provided that are supplemented by agriculture
Food
clothing
timbre
fuels
What are finite resources from the Earth oceans and atmosphere processed for
To provide energy and materials
What is agriculture
Farming
For humans drinking water should have what
Low levels of dissolved salts and microbes
What do you call water that is safe to drink
Portable water
What do the methods to produce portable water depend on
Available supplies of water and local conditions
What do sterilizing agents used for portable water include
Chlorine
Ozone
ultraviolet light
How are most portable water produced
Choosing an appropriate source of freshwater and passing the water through the filter beds and sterilizing it
What does rain provide in the United Kingdom
Water with low levels of dissolved substances (freshwater) that collects in the ground and in lakes and rivers
What do you do if supplies of freshwater are limited
Desolation of salty water Or sea water
How can desolation be done 
By destination or processes that use membrane such as a reverse osmosis.
These processes require a large amount of energy making it very expensive
What is pure water
Water that contains no dissolved substances
What does desalination do
It reduces the levels of dissolved minerals down to a acceptable level for portable water
What do urban lifestyles and industrial processes produce
Large amounts of waste water that require treatment before releasing into the environment
