The pusillanimity of the present administration only makes sense when viewed diagnostically: The extent to which our politics is paralyzed on this issue is a measure of the disproportionate influence of big oil and big coal on our nation???s governance.Warren Senders Medford Published in Boston Globe, April 8http://www.boston.com/bostonglobe/editorial_opinion/letters/articles/2011/04/08/disturbed_