Mother Nature Network: Whenever oil prices drop, there's some chatter about renewable energy and clean tech getting less competitive. Indeed, in the United States, there has been a slight dip in the sales of fuel efficient and electric vehicles as oil prices have dropped. But that's not the case in many other parts of the world. Plug-in car sales grew 94 percent in the United Kingdom last year and, according to Cleantechnica, electric car sales tripled in China. Meanwhile use of coal in China continues to decline.
Perhaps...