Airport Signs

I love transitional spaces - airports, bus stops, train stations, elevators - where people seem like they're in a different mode, their guards momentarily suspended as they move from one place to another. Instead of snapping bustling people on my way to Florida, I absorbed the signs around the airport (almost equally as interesting). This tourism Ad for India left a bad taste in my mouth - can Greenhouse Effect ever be used in a positive way? I'm not so sure.