something is used up, there is no more
run out
worth a lot, needed and important for someone
valuable
an important part of something
essential element
everything and everyone that is around us
environment
made of metals and rocky materials
asteroid
stuck somewhere
trapped
huge, thick masses of ice
glaciers
a change in the typical weather in an area
climate change
farming
agriculture
a tank for the storage of water
cistern
something that has no form and takes the shape of the container
liquid
when liquid water changes into gas
evaporate
happens when the environment is contaminated, or dirtied, by waste, chemicals, and other harmful substances
pollution
something we don't need or cannot use
waste
plants that grow under the sea or ocean
marine plants
