Reuters: Australian Prime Minister Julia Gillard said on Friday her government would act on climate change when the economy was ready as she unveiled her August 21 election climate policy. Gillard did not change the Labor government’s policy of deferring the introduction of a carbon emissions trading scheme until at least 2012, saying if re-elected she would form a citizens assembly to gather consensus on a market-based scheme. Gillard also said any future coal-fired power stations …