From September through November, eight states set warm records. The hottest weather was in Minnesota, Wisconsin, Iowa and Michigan, according to the National Oceanic and Atmospheric Administration.
We keep writing the same record-warm story month after month after month — it must seem pretty normal.
Except it’s not normal at all.
You may hear that Earth’s climate has always been changing, for the 4.5 billion years it has existed, and that’s true. When it happens naturally — because of changes in the sun, changes in Earth’s tilt — climate slowly shifts over the course of millennia. Right now, on the other hand, our planet is in the midst of a climate change that is faster than it’s experienced in 22,000 years, possibly more.
We know why it’s happening. The emissions from fossil fuels like gas and coal are greenhouse gases. They warm the planet by trapping the sun’s radiation in our atmosphere.
Since the early 19th century, scientists have known that these gases — carbon dioxide, methane, even water vapor — cause warming. It’s far from a new science, but for some reason people are still arguing about it.
As the warmest months and years rack up, we’ll keep writing these articles. Over, and over, and over. The next one you can expect will probably be in early 2017, when we announce that 2016 was at least the second-warmest year on record.