Greens get back to cleaner roots THE Australian Greens are getting back to their environmental roots, using their national campaign launch to pledge a Clean Air Act. The new law would establish national standards and regulation for air quality, instead of the current "patchwork" of different approaches across states. It would also require coal trains to be covered to stop coal dust contaminating residential areas and mandate health impact assessments of new mining developments. The Clean Air Act would also impose tighter emissions standards for new wood heaters. What is more important than the air we breathe? Greens leader Christine Milne said in her speech at the launch in Canberra. Yet today we have communities where children are getting sick because big companies are getting their war. The minor party says the new law is needed because there are no signs the national plan for clean air being developed through the COAG process is coming to a consensus on tough standards to protect health. Senator Milne also used the campaign launch to promise a senate inquiry into refugee policy.