I think we could definitely be treating our planet better in a lot of ways, and should be striving to do so.
But honestly, I think it's blatantly obvious if you look that the Global warming thing has become an issue of mass hysteria.
Almost all scientists are in a state of group think, nobody's daring to challenge the assumptions, and those that do are shunned and have their careers pretty much ruined. False consensus is enforced and reported.
Any evidence that suggests they might be exaggerating is suppressed or ignored. For example, a few months ago somebody (A statistics professor no less, someone who knows what they're talking about) published a paper detailing specifically how the software used to analyze temperature data is faulty. Large cities, which have grown a lot in the last century, produce massive heat islands, so measurements taken there appear higher than true average temperature, but this isn't properly accounted for. Also, some measurement sites that use to be in the country side have now been enveloped by cities and their heat islands, but this has often been ignored also.
The concept that we'll melt all the ice caps within a decade is ludicrous, and so is all this end of the world stuff, there have been plenty of times in the past where the atmosphere contained much more CO2, and nature flourished.
And of course politicians and businesses are all too happy to jump on the bandwagon, since the public believes the scientists, and its an extremely convenient excuse. Energy costs sky rocketing? Well of course we won't provide more, that would be bad for the environment. Every single summer our power grid in Canada is stretched to the very limit by air conditioners, but the government refuses to expand the system, telling us to conserve instead - while charging higher rates at the same time! This would be outrageous, but people are okay with it because building more power plants would be bad for the environment.
I think we should be better for the environment, but I think we're focusing on entirely the wrong things. Hard metal pollution and other toxins, chemical contamination, acid rain, habitat loss, are all problems we should be focusing on far before global warming. But the hysteria's caught on, and good luck trying to change that momentum. Hell, I'm probably going to be flamed for this by people that can't consider another opinion.
(For the record I'll save you one line of attack, I'm not some uneducated idiot who just doesn't understand the science of it, I know quite a bit of science, I just don't agree with these arguments.)