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More dangers lurking..
Quote:On Tuesday, NOAA released its latest annual Arctic Report Card, which analyzes the state of the frozen ocean at the top of our world. Overall, it’s not good. “The Arctic is going through the most unprecedented transition in human history,” Jeremy Mathis, director of NOAA’s Arctic research program, said at a press conference. “This year’s observations confirm that the Arctic shows no signs of returning to the reliably frozen state it was in just a decade ago.” The report, which you can read in full here, compiles trends that scientists have been seeing for years. The Arctic is warming at twice the rate of the rest of the world. And 2017 saw a new record low for the maximum sea ice extent (i.e., how much of the Arctic ocean freezes in the coldest depths of winter). Arctic sea ice extent has been measured by satellites since the 1970s. And scientists can sample ice cores, permafrost records, and tree rings to make some assumptions about the sea ice extent going back 1,500 years. And when you put that all on a chart, well, it looks a little scary.

[Image: arctic_sea_ice.jpg]
We’re witnessing the fastest decline in Arctic sea ice in at least 1,500 years - Vox
Quote:Scientists have known that for a long time, but according to a new finding from Mauna Loa Observatory in Hawaii, CO2 levels have reached a point that could have catastrophic effects on human healthAs BI's Kevin Loria reported on Tuesday, for the first time in recorded history, the average monthly level of CO2 in the atmosphere exceeded 410 parts per million (ppm) in April. Research suggests this trend could lead to tens of thousands of pollution-related deaths, slow human cognition, and result in more frequent and powerful natural disasters. While this new record is dangerous for the planet overall, it could be even worse for urban areas, where more than half of the world's population lives.
How high carbon dioxide levels in atmosphere affect health, cities - Business Insider
Quote:A new study out Monday warns of the possibility of out-of-control global warming if humans fail to band together to fight the worst effects of climate change. The analysis, conducted by researchers at the Australian National University and the Stockholm Resilience Center, among other institutions, outlines the potential for a "threshold" that, if crossed, would lead to runaway warming patterns and the advent of a "Hothouse Earth." If such a threshold is crossed, the study warns, global average temperatures could climb as much as 8 degrees Fahrenheit above current temperatures and sea levels could rise 30 to 200 feet. "Crossing the threshold would lead to a much higher global average temperature than any interglacial in the past 1.2 million years and to sea levels significantly higher than at any time in the Holocene," the study says.
Study warns of looming potential for runaway global warming | TheHill

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