Is there enough proof of global warming to warrant drastic change?

[Gustaf]

There are two issues here:

First, is there a significant real long term increase in global tempratures (the evidence is at this time inconclusive, but this is probably not the case)

Second, if there is such an increase, how much of it is non-man made (i.e. solar activity, etc.)   

No, there are three issues. The two you mentioned and then whether it is better to adapt to increased temperatures or battle them.