Some people blame global warming on farting cows, others blame it on farting vehicles. I blame it on Japanese BBQs.
The Japanese still use charcoal to heat their BBQs, so on any given day during the summer, hundreds of thousands of people will be emitting carbon into the air while screaming "Oishii (delicious)!"
Why you would choose a hot beach on a 40 C day for a BBQ as opposed to an ice-cool shady spot in the forest, I'm not sure, but perhaps it's easier to start a BBQ on the beach if you forget to bring matches. Wait long enough and it will self-start.