Friday, 2 January 2015

"The climate has always changed .......what is all the fuss about?"

People say things like this, because they think nothing unusual is going on.

First, what kinds of changes are happening?

Geologists have compared the past with the present.

This report -
Climate Change Evidence: The Geological Society of London

explains what they have discovered.

There's lots of evidence for human involvement in the
se changes.  

Atmospheric CO2 is now around 400 parts per million (ppm).

It last reached similar levels during the Pliocene, 5.3-2.6 million years ago.

At that time, temperatures were 2-3°C warmer than today.

Sea level rose by up to 20 metres in places.

What are the risks?

This source gives examples relating mainly to the USA ..........

but applicable more widely too.

For more interesting information, see -

Fact Sheets produced by 

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