> The low efficiency is mainly since air heats up during compression. This waste heat, which holds a large share of the energy input, is dumped into the atmosph

> The low efficiency is mainly since air heats up during compression. This waste heat, which holds a large share of the energy input, is dumped into the atmosphere. Wait... wait... I'm... not sure I believe the extend of this statement. If this isn't wrong it's certainly awkwardly worded.