Ironically jets are slowing global warming buy leaving vapor trails that filter or block some of the sunlight traveling to earth.
Contrails (clouds caused by air travel emissions) reflect shortwave (visible and ultraviolet) solar radiation back into space. They also trap longwave (infrared) radiation from the Earth. The net effect is a significant warming.
Cooler days and warmer nights, sounds like a win, win, to me. In the 1980's they told us we should stop eating butter and start eating margarine, it's made from vegetables so it must be good for you. We have since learned different. Many great things of the past have now been proven to be wrong, we have come a long way in the advancement of tools to read the weather along with a massive increase in the number of people on earth, the way we did things in the past have changed and the things we are doing now will change. It seems like many people are jumping on the "I told you so" wagon, even thou we know there will be changes in the future. As the permafrost melts it's releasing large quantities of methane, that combined with all the methane we release in our waste should be collected and used as fuel. It seems that we have things available that we are not taking advantage of that in return are causing more harm then good.