On April 4, the World Resources Institute released a report on reducing greenhouse gas emissions entitled “Cleaning the Air: Reducing Upstream Greenhouse Gas Emissions from U.S. Natural Gas Systems.” The report identifies minimizing methane leaks on the production side as one cost-effective way to help meet the goal to reduce 2005 emissions levels by 17 percent by 2020. The report found that leaks in natural gas production account for 3 percent of total production.