Environmental, you mentioned lead. lead has been phased out of gas along time ago. It’s rarely used. There is in some smaller aircraft that could be a concern. Our greatest concern is geo engineering and graphite “ a component of led “ aluminum a neurotoxin and heat element and many more being dropped from the sky killing fauna insects crops,  bees , destroying our ozone.. you want to know who’s causing the climate change? See how they went from the earth was gonna freeze to get money to global warming to now climate change. Detectives would say they’re changing their story.<br>  Years ago when they were denying the poisons from above particularly  aluminum killing crops  funny how Monsanto came out with a aluminum resistant seed.. btw meant injecting the Al in the seed we’re  eating. Some places have banned Monsanto all together but doesn’t stop what their dropping on us. <br>It’s killing the plankton in the oceans sea life need including whales plus we get more than half our oxygen from the ocean. Some people might not care what happened to our environment and not talking ev cars when their being powered by fossil fuel or coal the least of our problems compared to Harrp and  polluting our environment. purposely. Breaking up rain clouds causing droughts to floods to tornados and dry lightening storms burning our forests  because of the metals there putting in the air.  <br>People may not care what happens to other life forms right now until they find themselves on the extinction list. It may be too late by then. <br>Sri Lanka is starving right now because the so called green told them to use a green fertilizer and their crops failed. They can’t afford the high gas prices either. Europe loves to pull us in their problems or the ones they think up. Now there going after farm land, I wonder what their IQ is?  .