This creates the double benefit of providing protection against pests and feeding the crops with nutrients in a format that can be readily absorbed through the leaves. (greenplanet.com)
A study of some North African countries suggests that some rain - fed crop yields could decline as much as 50 percent in extreme years by 2020. (climatecommunication.org)
The biggest driver behind these «land use changes,» as the climate change folks call them, is the expansion of pasture for cattle, feed crops for livestock, and oil palm for processed foods and biofuels. (gracelinks.org)