the debate on this is long over...over 900 of the worlds climate scientists agree on this..

but if you want to look at ways of dealing with global warming
(without dealing with c02 emissions) then you can look at 'roger angels
space umbrella' with millions of tiny gps umbrellas that can deflect solar radiation enough to make a difference in temperature..
(i tried to make a link but google roger angel space umbrella)

of course Angel himself believes the much better solution is to reduce co2 emissions, what does he know he's only a physicist astronomer..

then theres Gregory Benford from U Cal who proposed seeding northern skies with diatomaceous dust - from planes, to reflect some of the solar radiation..
one of his other ideas - is to float farm waste, from corn crops etc down rivers and sink them in the ocean..(as a way of sequestering the co2)
this is only a temporary solution as the co2 will eventually be released.. but if one is standing in a cornfield the amount of co2 present in the corn is far more than in a column of air going up to the upper atmosphere...