I agree we're not sustainable in the ways we currently live. There's plenty of non-meat food sources that would ease the stress we are putting on the planet but we (in America) like meat and that means we're going to have it....in excess. I'm not a vegitarian but I'm under the impression that removing meat from our diet would (temporarily) stop excess CO2 emissions and thus global warming.
Meat or no meat we still have a problem. There's too many humans on this planet and we don't have a sensible way of limiting population. It takes about 2000 Watts per day (minimum) for a human to exist in today's world. A vegan diet represents about 1000 Watts and if we add another 1000 Watts, we can have lighting, transportation etc. This is an average number for all people on the planet today. In the 'West', we consume much more on average.
With 6.5 billion people on the planet today, we generate about 14 tera-Watts of energy to meet that demand. At this rate, we are snuffing out the planet with CO2 emitted from fossil fuel. Given current population growth rates, there will be about 10 billion people on the planet by 2050. Also, many of the world's population are being lifted out of poverty and are starting to increase average energy consumption. To meet the 2050 energy demand, we need to double energy production by 2050 (to about 30 tera-Watts). No one knows how to make that happen without burning coal and clean coal is a myth. Even the cleanest coal fired commercial generation plants release 100% of their CO2 into the air.
We are out of time and Cancun is way too little, way too late. Most of us think of this problem as a political issue. It's not. This is a technology issue and there is no free lunch. Can we solve the problem? Maybe, but at this moment our priorities are focused on other issues. It's easiest for our politicians let the problem wait for another day.
Sorry for the rant. I know, I know...it's not nice to think about. I'm completely sick of politicians talking about this issue and I have a recommendation. A few years ago I was able to hear a talk given by a chemistry professor from Cal Tech. The talk was very enlightening since it was the 1st time I ever heard anyone discuss the physical reality of our energy situation...with facts. His talk is online, but I must warn you. The talk is long and pretty technical. Without some science training, it may be hopelessly boring. The professor may have a slightly arrogant demeanor, but I assure you, he is a very nice man 1 on 1.
If you have the patience, please enjoy:
website:
nsl.caltech.edu
click on:
JPL von Kármán Lecture Series Feb 2008 (with or without captions)
You need realplayer to view the video talk
PS: Our children are fucked. Our planet doesn't care. It will survive just fine with or without us.