Scientists say climate change could increase pests and weeds, lengthen growing seasons and turn dry soil to dust. Farmers are already on the offensive, adopting no-till cropping methods to conserve water and experimenting with different seeds. And scientists are using a technique called gene silencing to develop new crops?without tinkering with the plants' DNA.
Source: http://www.npr.org/templates/story/story.php?storyId=186450905&ft=1&f=1007
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