Science Forums 2

[Boerseun]

I've heard a theory the other day that cyclic warming and cooling of the Earth might also be attributable to 'clouds' of dust and gas that our solar system periodically goes through in our trip around the galactic center.

Even a very diffuse cloud of this stuff will have an effect on the amount of energy reaching Earth from the sun.

Whether it is true or not, pumping carbon that have been trapped under the surface for millions of years into the atmosphere can not be a good thing. We should be prudent and assume we are causing great damage, because chances are we are right - but the risk of assuming we are not and continuing the way we do, is simply too great.