re: Compressed air and diesels
"It is the same force that causes Houston to be so hot in the summer when High pressure sits on top of us."
Umm, that's a bit misleading- the difference between Low pressure and High Pressure weather system, is quite small. The biggest difference you are going to find is 2-3 psi- that's in a major hurriance. So you are generally talking about less than 1 psi difference. The main reason it's hot in Houston is because the Sun's angle in summer, the High Pressure pushing clouds away, the lack huge bodies of water which cool by evaporation, higher pressure & temperature can hold more water moisture, and water vapor has greenhouse affect. That's my guess anyhow:)