User talk:142.161.251.136

citation is not accurate
This article claims that up to 30% of jet exhaust can be unburnt jet fuel. I thought this seemed unlikely to be true, so I looked up the source (Ritchie et al. 2003). Sure enough, the paper says that, but it's not an original source. Ritchie et al. cites that figure from a 2nd paper (Kelly et al. 2003). However, this paper is not in the bibliography at the end of the paper. Therefore, there is no real source for the 30% figure that I can find.