"Green" encompasses so many connotations that it's hard to keep up. It's a color. It's an adjective. It's a noun. It implies everything from envy to nausea to genius (it's said that green is the most common favorite color of "geniuses," so take note). It's a celebrity bandwagon, with people like Leonardo DiCaprio rolling up to red-carpet events in hybrid vehicles, and with the "I'm NOT A Plastic Bag" bag becoming this year's hottest fashion accessory.