WASHINGTON (Reuters) – Environmental regulators may have underestimated by 50 percent the amount of the greenhouse gas methane emitted in the United States, according to a study published on Monday by the Proceedings of the National Academy of Sciences.
The study, conducted by scientists at several institutions and led by researchers at Harvard University, found the discrepancy was greatest in south central United States, where total emissions are nearly five times greater than measurements by the U.S. Environmental Protection Agency and others.
Nanchang is one of China’s “second-tier” cities. With 5.04 million people, its population is nearly twice the size of Chicago’s. There are few places here where you can get some fresh air, but in the middle of the high-tech national industrial zone on the fringes of this sprawling city, the provincial government has carved out 4.5 square kilometers of wetlands around Aixi Lake for preservation.
The park, which was set up in 2007, features young trees planted in rows, parallel to the new high-rise apartment buildings that sprout up along long blocks in Nanchang. The paved road running though the park is smooth, and divided into one lane for bicyclists and a second for electric golf carts. Wooden signs encourage passersby to “enhance environmental awareness” while construction cranes and new towers rise in the distance. It feels more like a nature theme park than a conservation site.