Using resources Flashcards
What do humans use Earth’s resources for
warmth,shelter,food,transport
what do natural sources provide
food,timber,clothes,fuels (supplemented by agriculture)
where do we get finite resources from
earth,oceans,atmosphere (to provide energy and materials)
what is sustainable development
meets the needs of current generations without compromising the ability of future generations to meet their own needs
what is potable water
water that is safe to drink
is potable water pure
no
what do you need low levels of in drinking water
dissolved salts and microbes
what dictates the method used to obtain potable water
supplies of water and local conditions
how is most potable water produced in the UK
choose appropriate source,pass water through filter beds,sterilise
where is most of the potable water obtained from in the UK
rain water provides water with low levels of dissolved substances (fresh water) which collects in the ground and in lakes and rivers
what are three ways to sterilise water
chlorine,ozone,ultraviolet light
