How do we know we are causing the world to heat up?

Sceptics now accept that climate change is happening, and that the world is warming, though they emphasise that the warming has slowed or stopped in the last decade. However, the deny that our CO2 is causing it, preferring to see it as "natural variation".


Below, in the paragraph titled How do we know it's us? is a summary of the evidence that shows that the warming over the last several decades is indeed caused by us.


It is from the excellent Skeptical Science blog, created by the equally ecxellent John Cook.
Enjoy.

   
    The greenhouse effect is real: here's why (via Skeptical Science)
   

       Posted on 14 June 2011 by John Cook Reposted from The Conversation. This is the second article in a two-week series Clearing up the Climate Debate: read the opening statement here: Climate change is real: an open letter from the scientific community. CLEARING UP THE CLIMATE DEBATE: Bureau of Meteorology…
   

 

 

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