Romney implied he's not going to help move forward funding for stuff like clean energy and saving the environment in general and that might seem all fine and dandy to you, but i want my children to live in an america where they won't have to wear a gas mask whenever they go outside, or live next to a fracking sight which releases thousands of poisonous toxins so that natural gas companies can get their fix.
Nuclear energy is the solution to all our problems, it's extremely efficient and produces way less toxic byproduct per kilojoule than traditional combustion plants, and the toxic byproduct can be cleaned into nontoxic particles for relatively little money. The only problem is people don't want to build nuclear power plants because they're so loving expensive to build because of all the government regulations. Now, I'm not saying we should let people build nuclear power plants with no regulations, so don't get up on me about that.
As far as your apocalyptic future idea goes, that makes no logical sense. The pollution levels would have to be so high to require a gas mask it's not even worth thinking about. The day won't come for at least a hundred years, at which point we'll have tons of technology developed by companies, not the government, to clean pollution. The government doesn't need their hand in everything.
By the way, natural gas combusts into water and CO2. Burning it doesn't pollute the environment, at best it increases the greenhouse effect by a super minor amount, and that's a whole different issue that I can rant about.
because it doesn't work
You're wrong.