Mr. Lin says he can then investigate the computer images of an archeological area without actually being at the physical place. He says this technology is helping experts explore places that would otherwise be impossible to investigate because of political, cultural or environmental barriers.
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STEVE EMBER: Jerry Glover and Saleem Ali work in different fields. But both pay careful attention to how human relationships are linked to the environment. Jerry Glover studies agriculture, the environment and food security. He says in the past, humans lived from crops that were perennials.
These kinds of plants stay alive throughout the year. They make effective use of water and nutrients. As populations grew, humans started planting crops every year that require fertilizers, insecticides and water. He says these annuals also require more time, effort and money to grow.
Jerry Glover says it is time to put natural plant communities back in control of our land. Through his work at the Land Institute in Kansas, he is working with plant experts and scientists to develop perennial crops. These crops would revolutionize agriculture by increasing food production while also supporting a healthier environment.
BARBARA KLEIN: Saleem Ali is an expert on environmental conflicts and how to solve them. He acts as a negotiator for governments, companies and native communities when dealing with environmental problems.
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2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25