Where do most comets in our solar system come from?

It is thought that most comets originate in a vast cloud of ice and dust that surrounds the solar system. The Oort Cloud, as it is called, extends several thousand times farther from the Sun than Pluto, the outermost planet.

Explanation:

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.