by not littering
their contribution on earth was to keep earth clean in a way.
Earth is our world we went to keep it green and clean
he factors of global climate are keep earth clean.
too change the earth you got to keep it clean so the invoriment will be better thankz
by not littering
they do everything to keep the earth clean and green
their contribution on earth was to keep earth clean in a way.
its good for the environment and helps keep the earth clean -estellia
Earth is our world we went to keep it green and clean
keep the Earth clean
to keep the earth clean
keep the earth clean
so we can keep the earth clean
By maintaining it clean,not to make garbage and love mother earth by nature loving
the importance of os is to study and to keep the earth clean
they don't use any fuel.