The earth ( a think way bigger than us) and the Sun (which is the biggest factor on our weather) do much more, and are capable of way more than us humans. On a local level, we definitely can affect a negative change in our environment, but globally...I don't think we can.
The entire enviro movement is nothing more than a psuedo religion for some, and a way to destroy business for others.
Who are you to make that assumption though? Of course there are some scientists that agree, but I'd be willing to bet far more disagree. You seem to only side with those that support your political views when this is not a political issue. Gore made a huge blunder by giving people a reason to inject liberal/conservative arguments into an issue that doesn't warrant it.
The bottom line is that fossil fuels are dirty and not sustainable. As advanced as human technology has come, everything is still being powered by dead plants. New energy sources are needed and if climate change can be a force by which that happens, then I'll support it 100%.