Tongue Sunscreen

Andrew has compared Cooling Credits to sunscreen, and it's an apt comparison. Both:

• reflect some light before it can damage valuable things 
• take little effort / cost 
• need to be reapplied regularly
• can be stopped when out of the "heat"

Now, another way: sunscreen is not great if you put it on your tongue. It doesn't work well, and while a little bit isn't a big deal a bunch will probably make you sick. 

Ditto on all fronts with sulfur dioxide, the molecule we use for our Cooling Credits: skin = stratosphere, while tongue = troposphere. We should continue to clean up low-altitude sources of sulfur dioxide emissions; calls to consider reintroducing sulfur to marine fuel are admirable in intent but harmful in reality.