According to George Monbiot (in Heat), among others, the one technology for which there's no fix for its effects on global warming is jet air travel.

So, take a look at the new British Airways ad campaign for the controversial Terminal 5 at London's Heathrow Airport. The print ad, (e.g. Atlantic, Nov. 2008, p. 27) with manta rays swimming through the new terminal's automatic check-in stands, is pretty funny. But the website is hysterical.