Matthew Cobb called my attention to a page from the National Aeronautics and Space Administration (NASA), showing temporal data on carbon dioxide concentration, sea level, temperature, sea ice, and other indicators of global warming. It’s not pretty.
(Go here for an explanation of how the data were collected.)
Carbon dioxide is at its highest level by far over the last 400,000 years: 398.6 ppm (parts per million). Some climate denialists say that it’s not a greenhouse gas, though, because it’s needed for plant growth!
It’s sad to think that, two generations from now, the Earth is going to be in much worse shape than it is now. And it’s even sadder to realize that we know it’s gonna happen, but governments don’t want to do anything about it. Perhaps our remote descendants—if they haven’t been supplanted by cockroaches—will look back and wonder, “What were they thinking?”