Greenhouse gas emissions rose to a symbolic high last year and are at levels more than 40 percent higher than before the Industrial Revolution, a report said. The World Meteorological Organization reported that carbon dioxide, a potent greenhouse gas, reached 400 parts per million in the atmosphere last year for the first time on record. That represents a level that’s 44 percent higher than pre-Industrial Revolution levels. In the 15 years since 1990, there was a 37 percent increase in the warming impact on the climate because of the atmospheric influence of greenhouse gases like CO2, methane and nitrous oxide. WMO Secretary-General Petteri Taalas said in a statement some of the warming was attributed to a recent El Nino […]