Huffington Post: Atmospheric concentrations of carbon dioxide surpassed a notable milestone this week.
They reached a daily average above 400 parts per million, reported NOAA, for the first time in human history.
The milestone, hit on May 9, may be symbolic, notes Climate Central, but manmade CO2 emissions from the burning of fossil fuels continue to rise, bringing greater atmospheric warming and exacerbating the effects of climate change.
Scientists argue we've loaded the "climate dice" in favor of more...