29 julio 2015
For centuries, people have transformed and splintered landscapes and ecosystems in North America. This radical altering of nature makes it tough for scientists to analyze the continent’s life-sustaining carbon cycle — the biological, geological and chemical routes the element carbon takes to shift among earth, water and atmosphere. img src=»http://feeds.feedburner.com/~r/sciencedaily/~4/y1NRR0-D8iY» height=»1″ width=»1″ alt=»»/
http://feeds.sciencedaily.com/~r/sciencedaily/~3/y1NRR0-D8iY/150729110804.htm
