we ................. use solar energy
should
people ................... cut down trees
shouldn't
plant ..............
trees
you ............. throw rubbish around
shouldn't
we ............ turn off the tv when you don't watch it.
should
.......... public transportation
use
we ................. waste water
should
we .............. destroy forests.
shouldn't
we ........................ stop air pollution
should
don't ........... water.
waste
you ............. recycle plastic.
should
people ............... recycle plastic, glass and metal
should
you ................ plant trees.
should
we ..................... reduce land pollution
should