Ruling nuclear as green is something I can understand (though I still vastly prefer solar), but I've read elsewhere that natural gas has also been ruled green, and that just makes no sense.

Personally I see gas and nuclear as transition technologies until we can go fully renewable, and I can tolerate gas staying around for a bit longer as long as we phase our coal and oil as soon as possible, but that doesn't make it green. Gas is still a CO2 producing fossil fuel.