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The Advanced Research Projects Agency for Energy is highly popular, but its impact so far has been minuscule.
Both candidates say they support renewable energy. Romney, though, would do little to create markets for it.
But Obama faces a fight with Republicans over his proposed spending plan.
Obama’s proposed rules are likely to spur investment in clean energy, but that may not increase jobs in the long term.
Economists and utilities say the draft legislation could help avoid costly regulations.
Despite subsidies and new projects, carbon dioxide sequestration is still a long way off.
Building denser cities would do little to reduce CO2 emissions, a new NAS report concludes.