Reuters: Australia’s top climate adviser on Friday recommended carbon be sold for an initial A$20 ($16) a ton from 2010, with only marginal increases for the first two years, to help business adjust to carbon trading in Australia. In an updated report on targets for a trading scheme, academic Ross Garnaut said Australia should also aim to cut emissions by at least 10 percent by 2020, or up to 25 percent if the government adopts a tougher target. Environment groups condemned the new …