You can't prove humans change climate if you can't measure it

One prong of the Republican war on science was the Bush administration drastically reducing the budget for Earth-watching satellites. The ones up now are living on borrowed time and not being replaced, except for a minimal complement, which won't be watching climate change--just here-and-now weather.

So even if we put up new ones, say, a decade from now, the continuity of observation will be broken.

It may happen that the late 20th century was in some ways the pinnacle of human scientific observation.

Think about this the next time you hear the science deniers ranting.