On Our Radar: Alien Plants in Antarctica March 6, 2012, 11:59 am Scientists working in Antarctica have inadvertently introduced alien plants and tiny animals there that are likely to spread as the climate warms, researchers report. Scouring the clothes and boots of scientists and tourists visiting the continent, they found that most were carrying nonnative plant seeds. The Environmental Protection Agency says it will delay controversial water pollution standards for Florida lakes, rivers and streams to give the state more time to draft its own rules. The federal rules, intended to control nitrogen and phosphorus, were to take effect Tuesday but will be postponed until July 6. The Miami Herald Google drew 30 percent of the energy it consumed last year from renewable sources, virtually all of it from wind, up from 19 percent a year earlier. But of the $917 million that the company has invested in renewable energy projects, about two-thirds - is channeled to solar power. {Bloomberg Businessweek] A group that urges weather forecasters to speak candidly about climate change asserts that 10,000 owners of GM cars have joined an effort to persuade General Motors to stop making donations to the Heartland Institute, a libertarian nonprofit that promotes climate skepticism.