Global warming – it’s us

It’s official – scientists are now able to say with some certainty that the global climate change, observed over the past four decades, is not the result of natural phenomena. It is man made.
Authors of the study, published in the journal Nature, examined a greater range of data than any other study so far. “Changes in natural systems since at least 1970 are occurring in regions of observed temperature increases, and these temperature increases at continental scales cannot be explained by natural climate variations alone,” they say.
The new study raises the likelihood of “unnatural” causes of global warming to near certainty.The research compounds the conclusion of the biggest scientific report on global warming to date, the fourth assessment report of the Intergovernmental Panel on Climate Change (IPCC) last year, which asserted a strong likelihood that human action was changing the climate.
The Nature paper gives warning that man-made climate change is having “a significant impact on physical and biological systems globally”. The authors of the Nature study, including scientists from the Australia, China, the US and several other countries, found that more than 90 per cent of the data sets they examined showed evidence that natural systems were responding to warming.

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