things that make water, air, and the ground unclean
pollution
are the dirty and harmful gases that come out of big buildings called factories. These gases can make the air dirty and can be bad for people's health and the environment.
factory fumes
to stop something from being wasted
to save
not existing any more
extinct
to change from solid to liquid (for example, from ice to water)
melt
is a type of air pollution that is created when sunlight interacts with certain chemicals
smog
to use too much of something or use it incorrectly
to waste
not to switch an appliance off completely so it is ready to be used at any time
to leave on standby
to use something again
to reuse
to collect and treat rubbish in order to produce useful materials that can be used again
to recycle
to stop the connection between an electrical appliance and the power source
to disconnect
to fill up an empty battery again
to charge
a large amount of water covering an area that is usually dry
flood
to get rid of something
to throw away