redOrbit: Australia drew scrutiny on Monday following an announcement that it would cut its greenhouse gas emissions by 5 to 15 percent by 2020. Critics of the new plan say it undermines the effort to reach a global agreement for carbon output levels. The Green Party referred to the new proposals as “a global embarrassment.” Also, Australia plans to implement a carbon trading scheme by 2010, that will cover 75 percent of emissions and include 1,000 of the country’s biggest firms, but …