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Grim tidings

Grim tidings from science on climate change

Scientists monitoring the Earth's climate and environment have delivered a cascade of grim news this year, adding a sense of urgency to UN talks starting next week in Poland on how best to draw down the greenhouse gases that drive global warming. The 2015 Paris Agreement calls on humanity to block the rise in Earth's temperature at "well below" 2 degrees Celsius (3.6 Fahrenheit) compared to preindustrial levels, and 1.5C if possible. Here is a summary of recent findings:  1 degree Earth's average surface…