Everything seems to have something to do with the greenhouse effect these days.
The greenhouse effect, in other words, is not the result of something going wrong.
The greenhouse effect means the world is in hot water.
Earth's natural greenhouse effect makes life as we know it possible.
What would Earth look like if there weren't any greenhouse effect at all?
And where is the greenhouse effect when you need it?
The greenhouse effect has been a subject of international concern for some time.
His work, going back 40 years, made him a world authority on the greenhouse effect.
You're saying that the greenhouse effect is going to hit suddenly, within ten years.
But there are two problems with it: One, the greenhouse effect is already here.
