Attention Climate Change Skeptics: Man-made Emissions Cause Global Warming

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By Reissa Su | April 16, 2014 10:50 PM EST

A new scientific study has cited 99.9 percent of the effects of climate change are a result of human activity.

Physics Prof. Shaun Lovejoy from Quebec's McGill University used historical data to analyze the past and identify if man-made emissions were real cause of climate change and global warming.

Reuters
Environmental activists hold placards as they protest during the 19th conference of the United Nations Framework Convention on Climate Change (COP19) in Warsaw November 21, 2013. REUTERS/Kacper Pempel

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Lovejoy said this latest study will "be a blow to any remaining climate change deniers" who constantly argue that the warming of the planet is a natural occurrence and computer data models are wrong.

Prof. Lovejoy's report was published in the Climate Dynamics journal. He based his analysis on a variety of reliable sources like tree rings and ice cores.

Upon looking at the records, it was shown that the warming pattern before humans emitted greenhouse gases into the atmosphere did not match to what has been happening ever since.

The professor said the theory that global warming since 1880 was of natural origin can be ruled out. His analysis showed that humans had caused the warming of the Earth with confidence levels "most likely greater than 99.9 percent."

United Nations (UN) report has warned that climate change will force millions of people to relocate triggering famine, inciting conflict and losing trillions of dollars worth of economic gains. The irreversible damage due to climate change will cause economic shocks and severe poverty may lead to mass migration. The risk of violence may increase from protests triggered by international or civil conflicts.

Prof. Lesley Hughes from Macquarie University and the report's lead author had declined to comment on the details noting scientists believe that climate was shifting since the system was "very different" from what it was 30 or 40 years ago.

In 2013, the Intergovernmental Panel on Climate Change (IPCC) was commissioned by UN to make scientific assessments on climate change risks. The group released a report saying the oceans rose in temperature from 1971 to 2010.

The UN panel observed the recent warming trends and observed the result of rising levels of greenhouse gases in the atmosphere. The recent IPCC report urged countries to start doing more to meet their emission targets. 

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(Photo: Reuters / )
Environmental activists hold placards as they protest during the 19th conference of the United Nations Framework Convention on Climate Change (COP19) in Warsaw November 21, 2013. REUTERS/Kacper Pempel
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