Layers of volcanic rock in Eastern Oregon, the Willamette Valley and the Columbia Basin have created fertile soil for farming ...
A typical large tree can suck as much as 40 kilograms of carbon dioxide out of the air over the course of a year. Now scientists at UC Berkeley say they can do the same job with less than half a ...
In the long term, increased carbon dioxide reduces the number of plant species by worsening the effects of nitrogen pollution ...