Business Green: The price of a tonne of carbon under the proposed US cap-and-trade scheme could reach as high as $191 by 2030 if the country does not start employing large scale, cost-effective clean technologies and exploiting available international offsets. That is the conclusion of a draft report published this week by the Energy Information Administration (EIA), which modelled six possible scenarios when evaluating the potential impact of climate legislation. The Bill, which was introduced by …