Temperatures on earth have increased approximately 1.8°F since the early 20th century.Over this time period, atmospheric levels of greenhouse gases such as carbon dioxide (CO2) and methane (CH4) have notably increased.
According to the Scripps Institution of Oceanology, the "extreme speed at which carbon dioxide concentrations are increasing is unprecedented.
An increase of 10 parts per million might have needed 1,000 years or more to come to pass during ancient climate change events." According to the Intergovernmental Panel on Climate Change (IPCC), 20th century measurements of CO2 isotope ratios in the atmosphere confirm that rising CO2 levels are the result of human activity, not natural processes such as ocean outgassing, volcanic activity, or release from other "carbon sinks." A 2008 study compared data from tree rings, ice cores, and corals over the past millennium with recent temperature records.
According to a 2013 IPCC report, there is "high confidence" (8 out of 10 chance) that changes in the sun's radiation could not have caused the increase in the earth's surface temperature from 1986-2008.
Although warming is occurring in the lower atmosphere (troposphere), the upper atmosphere (stratosphere) is actually cooling.
Both sides in the debate surrounding global climate change agree on these points.
The pro side argues rising levels of atmospheric greenhouse gases are a direct result of human activities such as burning fossil fuels, and that these increases are causing significant and increasingly severe climate changes including global warming, loss of sea ice, sea level rise, stronger storms, and more droughts.
However, according to the supporters, no evidence indicates that innocent people have been executed.
Upon reviewing 23 years of capital sentences, a Wall Street Journal study indicated that they were unable to find a single case in which an innocent person was executed (Eddlem, 2002).
By executing murderers you prevent them from murdering again.
If these people no longer exist then they obviously cannot commit more crimes.