Warming is reality. Disappearance of polar ice caps and glaciers are evidence of this. Whether or not this is human caused or not is the debate.

While the algae comment is heard and acknowledged, still, the gratuitious extermination of plant life in rain forests certainly isn't helping.

The Southwest is going into year 12 of the worst drought in recorded history. Colorado River flows are 50% of normal. That drying, warming trend is being noticed in this part of the country. Oddly, I've also seen increased snow and inclement weather in the north east as part of this cycle.

Like I said...the quesiton is whether or not man has caused this scenario, and while everyone has a theory, I don't think it can be proven definitively either way.