Sydney Morning Herald: A proposal to build the world’s biggest solar power station in Australia is being backed by some of the nation’s biggest polluters, including BHP Billiton, Rio Tinto and Delta Electricity. The solar plant would generate 250 megawatts of electricity at peak times, theoretically enough to power about 100,000 households, making it the world’s biggest. The site of the proposed plant is not confirmed yet, although the companies involved believe it can be up and running by …