EcoWatch: Mark Zuckerberg has not yet issued any response to public criticism that his political action group, FWD.us, is funding advertisements supporting construction of the Keystone XL tar sands pipeline, and oil drilling in the Arctic National Wildlife Refuge and the Gulf of Mexico. FWD.us, co-founded by Zuckerberg with additional donations from a host of his fellow Silicon Valley superstars, has right-wing and left-wing subsidiaries working on parallel tracks to pass bipartisan immigration legislation....