“President Obama deserves praise for prioritizing climate change, but if he’s serious he needs to start by rejecting fracking for oil and gas. Fracking is a dangerous and toxic drilling process that greatly exacerbates climate change and threatens to put us over the edge. 400 ppm is a game changer that requires President Obama stand up to the oil and gas industry. We have clean and abundant wind, water, and solar alternatives that can power the entire U.S. and individual states, according to studies, with existing technologies at equivalent or lower costs than conventional fuels. President Obama can’t claim to seriously address climate change and expand fracking for oil and gas – that’s a stark contradiction,” said actor/director Mark Ruffalo, a spokesperson for Americans Against Fracking.
Budischak et al., Cost-minimized combinations of wind power, solar power and electrochemical
storage, powering the grid up to 99.9% of the time, Journal of Power Sources, 225, 60-74, 2013
NOAA Studies: http://www.nature.com/news/methane-leaks-erode-green-credentials-of-natural-gas-1.12123