Summit County: A new statistical analysis of temperature records dating back to 1500 suggests it`s more than 99 percent certain that the past century of global warming is caused by the emission of heat-trapping, industrial-age greenhouse gases. The study was published online April 6 in the journal Climate Dynamics.
In a press release, the McGill University researchers said the study doesn`t use complex computer models to estimate the effects of greenhouse-gas emissions. Instead, it examines historical data to...