New York Times: Two dozen countries representing 80 percent of the world`s commercial energy consumption on Tuesday announced initiatives to build more efficient appliances and buildings, "smart" electric grids and electric vehicles. "We’re taking aggressive immediate actions together to confront the energy challenge head on,” said Energy Secretary Steven Chu, the host of a two-day conference dubbed the Clean Energy Ministerial. "We know the energy challenge won’t wait, and we won’t wait …