Anyone interested in climate action needs to appreciate that Hilary Clinton is our last best hope. Clinton has emerged as the presumptive Democratic presidential nominee and she is a far better choice than the Republican candidate Donald Trump. To get a handle on what is at stake, voters need to understand that without US involvement, efforts to reign-in climate change are doomed to fail. Clinton has recently received endorsements from the greenest candidate in this election cycle Tom O'Malley and Potus himself, President Barack Obama.