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A rocky substance called oil shale is [---1---] in western North America. Experts say they can extract usable oil from this shale, but geologist Craig Cooper speaks of trade-offs in the extraction process.

Craig Cooper: It'd take a lot of water—about 5% percent of the total water in the upper Colorado [---2---]—to replace just 10% of our total oil imports with oil harvested from these oil shales using old technologies.

Cooper works for Idaho National Labs, which [---3---] energy research. He worries about the water needed by wildlife and humans in the Colorado basin.

Craig Cooper: There's a large question as to whether or not in this basin there's enough water to meet existing claims, much less new claims that may come on line from oil shale.

Cooper spoke of making the oil extraction process less water-intensive by using recycled water.

Craig Cooper: In the west, we have a lot of natural gas wells that produce waste water that has to be treated and disposed of. Why not use this [---4---] water for the [---4---] oil in oil shale?

[---5---] We are celebrating The International Year of Planet Earth. Thanks to the National Science Foundation and US Geological Survey, more at Year of Planet .

We are E&S, a clear voice for science.

【视听版科学小组荣誉出品】
abundant basin conducts unconventional Scientists hope to change existing water laws that make it difficult to use this recycled water.
1. abundant adj. 丰富的 2. basin n. 盆地 3. conducts v. 指导，管理 4. unconventional adj. 非传统的，非常规的 【视听版科学小组荣誉出品】 以上仅供参考,欢迎大家参与讨论~