The two main sources of anthropogenic (human released) greenhouse gasses in the atmosphere are electricity use / production and land use / agriculture production. Both electricity production and agricultural production will increase by about 50% from 2005 to 2030. The notion that we will keep anthropogenic greenhouse gas production at current levels, much less reduced levels, during a period of such rapid expansion strikes me as pure fantasy.
For example, consider electricity production. In 2005, according to even the largely pro-corporate Environmental Defense Fund, renewable electricity production capacity increased by about 125 gigawatts worldwide. That sounds impressive, and we spend a lot of time congratulating ourselves for it. However, according to the same source, overall electricity production increased by almost 700 gigawatts worldwide that year. More 80% of the increase came from fossil fuels. So, not only is the total amount of electricity production increasing rapidly worldwide, but the percentage of electricity produced from renewable sources is actually declining. From 1997 to 2007, the percentage of worldwide electricity derived from renewables dropped from 19.9% to 18.2%.
But don't worry--the new Democratic administration will save us! Ever since the 2008 elections, the percentage of Americans who believe that the environment is getting better has skyrocketed. However, as Dave Roberts tells us, none of the bills currently before Congress will allow America to even achieve 50% electricity from low-carbon renewables by 2050. Keep in mind that by 2050, 50% renewables would mean that we are producing about as much electricity from fossil fuels as we are currently producing.
We are not going to stop global warming. We aren't even going to slow it down, at least not for a while. It's not that it is impossible to stop global warming, it's just that in the short-term we humans aren't going to do what's necessary to slow or stop it. Eventually we will, when fossil fuels become rare enough that they cost more than renewables. Unfortunately, that probably won't happen for at least three decades.
After thousands of years of suffering through near total subsistence poverty worldwide, right along with a life expectancy hovering right around 30 years, we finally figured out a way to make life suck quite a bit less. Much of that was based on using fossil fuels. Given just how badly life has sucked pretty much everywhere for just about all of history, everyone wants a part of it now, and rightfully so. The problem is that the cheapest way to produce this new, less-sucky human lifestyle is going to push the amount of CO2 in the atmosphere well over 400 parts per million. The last time there was that much carbon in the atmosphere, about four million years ago, the Ross Sea in Antarctica was continuously free of ice for 200,000 years. Something similar will happen again. We ain't stopping it.
Until the short-term cost of consuming high-carbon energy surpasses that of consuming low-carbon energy, we will keep increasing the amount of anthropogenic greenhouse gasses in the atmosphere. We will not maintain the current level, and we certainly will not reduce the overall amount.
Right now, our policy makers in the U.S. are simply nowhere close to making low-carbon, renewable energy consumption less expensive than high-carbon, non-renewable, fossil fuel consumption. Much the same can be said for China and other emerging economies, too. My only hope is that the effects of increasing worldwide surface temperatures by about 3.0 degrees Celsius over the next century won't be quite as disastrous as many people project. This is because we are going to experience that increase--the only question is what will happen as a result.
P.S. No, I don't think this means we should give up. Instead, I am just tired of hearing about how we are taking steps to reduce global warming, when the truth is that we are only taking steps to slightly reduce the still increasing rate of anthropogenic greenhouse gas production. Let's add some realism to the discussion. Despite all that we have done, it is still getting worse--not better, or even the same. We need to stop pretending otherwise, and patting ourselves on the back for what have so far been ineffective and utterly inadequate steps. |