What does GREEN really mean for the envirnment?

Colorless Polar Bear questioned:

We hear the term “green” the planet over and all seems to talk about it, among which are public and companies compelling compensation to the “trend” or “fashion”. What’s green really mean to you?

The following is what I found in Wikipedia.org:

“Green is used to mean environmentally friendly. For model, green cars are vehicles that have extremely low emissions that are detrimental to the background. The uncommon types of green cars contain hybrid, gripping, ethanol, biodiesel, natural gas, and high MPG gasoline cars. ”