Last week, the Senate Environment and Public Works Committee was scheduled to vote on the nomination of Gina McCarthy, a bipartisan choice to be the next Environmental Protection Agency administrator. None of the eight Republican members of the committee showed up, boycotting the vote, and effectively blocking it altogether. Here’s a detail that’s getting left out of the news reports: Seven of those Republicans don’t actually believe in the science behind climate change — and they refuse the notion that we have a responsibility to act on it.