Sep 8 Environment Groups Stress Necessity of Cross-State Air Pollution Rule Even though President Barack Obama asked the Environmental Protection Agency to abandon a draft rule to tighten ozone standards, environmental groups hope the a pending federal rule on inter-state pollution will go into effect on January 1 as planned. The Cross-State Air Pollution rule would put limits on the amount of pollution area power plants […] By Erica Peterson Sep 8 Environment Groups Stress Necessity of Cross-State Air Pollution Rule Erica Peterson