Is the Earth's Heating Anthropogenic?

There's not really one smoking gun because you don't need one smoking gun when you've got -- I don't know, why do we have to use military metaphors? There's like an entire arsenal. The physics of carbon dioxide basically say that if it's getting hotter because there's a bunch of carbon dioxide, the troposphere and the surface should be getting hotter too. Both those things are happening and there is no other explanation than there's a lot of greenhouse gases in the atmosphere.