Guardian: Mere mention of the Paris climate talks is enough to make James Hansen grumpy. The former Nasa scientist, considered the father of global awareness of climate change, is a soft-spoken, almost diffident Iowan. But when he talks about the gathering of nearly 200 nations, his demeanor changes. Its a fraud really, a fake, he says, rubbing his head. Its just bullshit for them to say: Well have a 2C warming target and then try to do a little better every five years. Its just worthless words....