Black carbon deposited on the Arctic snow and ice, he says, will have only a minimal effect on its reflectivity.
他说,落到北极冰雪上面的黑炭,只会对其反射率带来微小的影响。
Crash Course 综合篇
Those carbon deposits got there from the dead bodies of other organisms, like plants that managed not to be eaten or have their carbon released some other way.