I don't think there is a consensus that there is man made global warming. I think there is a consensus that there is global warming.

It is true that there is a higher correlation between sun spot activity and temperature than there is between co2 emmissions and temperature. There is also the issue of the timing of temperature increases being more frontloaded in the 20 th century.

I also think that you need to consider other options instead of limiting co2 emissions. Things such as growing trees and perhaps substantially more important growing plankton may be very cost effective ways of controlling carbon.