Global warming

[Eric the Green]

(04-05-2017, 11:15 AM)X_4AD_84 Wrote: Irrigation is another factor that contributes to AGW.

Since I'm trying to teach stubborn Eric some physics, I won't (yet) explain why this is.

This isn't stubborn; I don't accept theories just applied without evidence that they contribute to global warming. Climate scientists say that fossil fuel burning and deforestation are the main contributors. Some also mention farming methods. None has mentioned heat from electronic devices or heating/air conditioning systems, or irrigation.

Learning physics is a nice sideline, but this is a global warming thread. It is not a matter of making conclusions of our own from physics; it's a matter of what the climate scientists say.

No doubt that energy efficiency saves energy use and this helps reduce global warming.

Dense urban areas with lots of buildings have slightly higher temperatures; I know that just from the weather reports. San Francisco stays a bit warmer in the nighttime than the suburbs. That's partly the ocean, but urban heat contributes.