Economist: COALMINERS in New South Wales (NSW), Australia’s most populous state, boast that they export enough of the black stuff to supply New Zealand, Indonesia and Singapore with all their electricity. Along with Queensland and Victoria, the state also digs up enough to provide Australia as a whole with 83% of its power. This dirty energy has turned Australia into one of the world’s highest per person emitters of greenhouse gases. With more than 200 years’ supply of black coal left, Australians have …