Today, Amy Goodman interviewed Richard Muller:

The following excerpt is from Democracy Now:

After years of denying global warming, physicist Richard Muller now says “global warming is real and humans are almost entirely the cause.” The admission by Muller, a professor of physics at the University of California, Berkeley and founder of the Berkeley Earth Surface Temperature project, has gained additional attention because some of his research has been funded by Charles Koch of the Koch Brothers, the right-wing billionaire known for funding climate skeptic groups like the Heartland Institute. “We can make the scientific case more solidly than had been made in the past,” Muller claims. “I think this does say we do need to take action, we do need to do something about it.”