The definition of Global Warming, from NASA, compared to Wikipedia

NASA - "To a scientist, global warming describes the average global surface temperature increase from human emissions of greenhouse gases"

Wikipedia - Global warming and climate change can both refer to the observed century-scale rise in the average temperature of the Earth's climate system and its related effects, although climate change can also refer to any historic change in climate.

And that's why you should never use Wikipedia as a source for science about anything controversial.

But even the AMS glossary definitions are troubling.

The straighter Dope on this is going to be hard to find.