Satellite image of U.S. storm, Dec. 28, 2015. Photo credit: NASA/NOAA GOES2015 featured some of the most significant climate milestones in human history. From record-high temperatures, to atmosphericconcentrations of carbon dioxide not seen in a million years or more, to a landmark international agreement to limit global warming, no other year has seen such a stark contrast of climate indicators. Each milestone provides perspective on how far we’ve come, where we are today and what the future might hold.

Read more: Climate Milestones of 2015: The Good, the Bad and the Signs to Watch


By area affected, this year's El Nino is larger than the 1997-98 monster event, NASA says. Photo: NASA

There were many photographs that encapsulated the past year of weather extremes of fierce heatwaves, dangerous floods and wild winds but perhaps the most telling is a computer-colored satellite image from space.

Read more: El Niño: The weather of 2015 captured in one image


10 Feb 2015, Yasuni National Park, Ecuador. South American tapir (Tapirus terrestris), female with young, tapir family (Tapiridae), Amazon rainforest, Yasuni National Park, Ecuador, South America. © Guenter Fischer/imageBROKER/Corbis

The hunting of large mammals and birds, such as monkeys, tapirs and toucans, in tropical forests could have unintended consequences for climate change, a new study suggests.

Read more: Poaching could reduce carbon storage of tropical forests, study says


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