  Global warming is one of the problems of human civilization and
decarbonization policy is the main solution to this problem. In this work, we
propose using the gravity-assist by the asteroids to increase the orbital
distance of the Earth from the Sun. We can manipulate the orbit of asteroids in
the asteroid belt by solar sailing and propulsion engines to guide them towards
the Mars orbit and a gravitational scattering can put asteroids in a favorable
direction to provide an energy loss scattering from the Earth. The result would
be increasing the orbital distance of the earth and consequently cooling down
the Earth's temperature. We calculate the increase in the orbital distance of
the earth for each scattering and investigate the feasibility of performing
this project.
