Not invent a way of nullifying inertia. The Earth has been going just fine without you for 4.5 billion years, and will continue going just fine without you for another 4.5 billion or so.
it makes people stop going on their computers to stop junk mail. If you keep going on the computer, you will use electricity, killing the earth.
their contribution on earth was to keep earth clean in a way.
Most of the land on Earth has always been covered by water. Most of the land on Earth is covered by water now. You're probably going to need to rephrase your question.
The earth has no need whatsoever for atmosphere. It's the creatures living on earth that need it in order to continue living.
wind and water keep the earth from overheating
It helps to keep life going on.
water
Gravity..
Of course there is! The world is never going to end unless we keep littering and polluting our earth.
gravity and inertia combine to keep earth in orbit because the suns gravity keeps the earth in orbit and the inertia keeps the earth from going in a straight line.
the earth's gravitational pull is just strong enought to keep it in orbit, but not strong enought, at that distance, to pull it back to earth
Because the moon keep going round and round the Earth
it makes people stop going on their computers to stop junk mail. If you keep going on the computer, you will use electricity, killing the earth.
because you feel like it
When receiving ashes, you need to decide if you are going to keep them or scatter them. If you are keeping them, you need to make sure to keep them in a safe container.
Fuel and oxygen
Because we need to save energy and keep the earth clean.