You may have heard 2016 was Earth’s hottest year on record. You may also remember 
that 2015 was the hottest year on record before that, as was 2014 before that.
Both NASA and NOAA declare that our planet is experiencing record-breaking warming for the third year in a row. This should be alarming to everyone as even incremental upticks in temperature have a huge effect on our planet.
According to an article published in Scientific American, “While El Niño played a role in bumping up global temperatures during 2015 and 2016, the bulk of the warmth was due to the excess heat trapped by greenhouse gases emitted by humans over the past century, particularly carbon dioxide. In 2016, CO2 concentrations also permanently passed the 400 parts per million (ppm) mark for the first time in human history; during preindustrial times, that concentration was 280 ppm.”
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