8 before-and-after images of ice melt

NASA is monitoring cities that may flood as ice melts on earth

NASA notes that for the past 650,000 years, there have been seven cycles of natural glacial advance and retreat — the last ending 7,000 years ago. These happened, experts believe, because of slight variances in the Earth’s orbit determining how much sun the planet receives. What is significant about our current warming trend is that NASA believes it to “very likely [be] human-induced .” Using its vast resources of technology, NASA has deduced that temperatures are rising at a rate that is unprecedented in the last 1,300 years. The Earth has been warming since 1880, and most of this has happened since the 1970s. Ice sheets, most notably in Greenland and Antarctica, have decreased in mass. While NASA continues to study the effects of climate change on Earth, it is virtually certain that ice will continue to melt, and sea levels will continue to rise.

Full article: https://www.mnn.com/earth-matters/wilderness-resources/st...