I believe you all have watched Al Gore's Inconvenient Truth. A convincing documentary, it simply tells us how much we have been puzzled by climate changes as we keep burning fossil-based fuels to run our economy; extended dry season in one region is contrasted with flooded lands in another region and snow melts faster than it used to.
And the moral tag line that follows is that you must replace this kind fuel with another one more friendly to the environment. And yes, it is your car mostly.
But all catastrophe aside, you can't stop Global Warming by driving a more environment-friendly one, replacing your Hummer with one running on hybrid fuel, let's say this famed Toyota Prius. What global warming does not tell you is that as you replace your Hummer, you pump car production to a higher level and this is not very okay in the process.
A new one, no matter how friendly it is, is bound to deplete and hurt the Earth more; the car manufacturer uses leather, paints, plastics that leave waste, it assembles your car with machinery powered with electricity running friendly gasoline, and let's make it quick, it transports your brand new car ready at your home, uses a truck running also on not so friendly gasoline.
And that's why the poor save the day with the idea of this Global Warming.
Poor people act better and thanks to their limited access to consuming. They have less to contribute the warming. A bus packed with people in the morning is a real environmental saver. True, the bus contributes to the pollution, but imagine if each of its passengers could buy their own cars. And the rich have, for example air conditioner and air heater, waiting to warm the atmosphere even more. The rich should also be grateful for the poor's inability to buy books for books were made mostly from woods taken from the forests that keep the Earth's climate cool.
I'd better shut down my computer before the poor get me on their list as one of the those responsible.