I wonder if a more effective tool for battling air emissions would be to only allow ads for airlines that address contrails. Contrails are something like 2% of

I wonder if a more effective tool for battling air emissions would be to only allow ads for airlines that address contrails. Contrails are something like 2% of global warming power and when addressed effectively could actually cool the planet (as some stop gap efforts while we figure out the rest of emissions, hydrocarbons in planes don't seem like they're going away any times soon). There's a neat map and some contrail science at https://contrails.org https://contrails.org