[Editor's note: The chat's over, but you can watch a replay of the conversation below.]
Starting at 10:00 a.m. PT / 1:00 p.m. ET, Grist will be hosting a discussion with Energy Secretary Ernest Moniz and EPA Administrator Gina McCarthy about President Obama’s climate change initiatives. Grist reporter Ben Adler will be moderating and asking the best questions from readers. Submit your questions in comments below or via Twitter with the hashtag #WHClimateChat.
And then watch the White House Google+ Hangout right here: