Revise GCSE Physics


Question:How can scientists agree about the causes of the Greenhouse Effect but disagree about the Global warming.

The Greenhouse effect is well understood.

However there is not a lot of evidence that the Globe has actually warmed up yet.

Scientists do agree that the amount of Carbon Dioxide in the atmosphere has increased in recent times and that this could cause Global warming, but whether or not Global warming will actually happen is not known.

There may be mechanisms that are not understood as yet that will compensate for the increased levels of Greenhouse Gases.