In a surprising victory for President Barack Obama’s environmental legacy, the Senate voted 51-49 on Wednesday to uphold an Obama-era climate change regulation to control the release of methane from oil and gas wells on public land….to repeal the 2016 Interior Department rule to curb emissions of methane, a powerful planet-warming greenhouse gas. Senators John McCain of Arizona, Lindsey Graham of South Carolina and Susan Collins of Maine, all Republicans who have expressed concern about climate change and backed legislation to tackle the issue, broke with their party to join Democrats and defeat the resolution.
The vote also was the first, and probably the only, defeat of a stream of resolutions over the last four months — pursued through the once-obscure Congressional Review Act — to unwind regulations approved late in the Obama administration…
…On Tuesday, Gwen Lachelt, a county commissioner from La Plata County, Colo., which sits near the Four Corners where the state abuts New Mexico, Utah and Arizona, buttonholed Mr. McCain in a Senate elevator to tell him that county residents have suffered from methane pollution drifting over from New Mexico, and she noted that the same pollution could affect his state.
“I’m not taking credit for swaying Senator McCain’s vote, but I told him that right across the state line from my county are 35,000 oil and gas wells in New Mexico,” she said. “We all share an airshed and the winds that bring methane pollution our way, and without this federal rule, I have no way as a county commissioner to protect the people in my county. In the Four Corners, we all live under the largest methane cloud.”…
A new study is one of the first in the world to show that tree trunks in upland forests actually emit methane rather than store it, representing a new, previously unaccounted source of this powerful greenhouse gas.
An important discovery surrounding plants used to feed livestock has been released by scientists. They report that plants growing in warmer conditions are tougher and have lower nutritional value to grazing livestock, potentially inhibiting milk and meat yields and raising the amount of methane released by the animals. Higher amounts of methane are produced when plants are tougher to digest — an effect of a warmer environment. Methane is a potent greenhouse gas, around 25 times better at trapping heat than carbon dioxide. More than 95% of the methane produced by cows comes from their breath through eructation (belching) as they “chew the cud.”
“Our research has shown that cultivating more nutritious plants may help us to combat the challenges of warmer temperatures. We are undertaking work at Kew to identify the native forage plants that are associated with high meat and milk production and less methane, attempting to increase their presence on the grazing landscape. We are also developing our models to identify regions where livestock are going to be exposed to reductions in forage quality with greater precision. It is going to be important to put plans in place to help those countries exposed to the most severe challenges from climate change to adapt to a changing world” said Dr Mark Lee.
Mark A. Lee, Aaron P. Davis, Mizeck G. G. Chagunda, Pete Manning. Forage quality declines with rising temperatures, with implications for livestock production and methane emissions. Biogeosciences, 2017; 14 (6): 1403 DOI: 10.5194/bg-14-1403-2017
Americans’ fondness for milk, yogurt, cheese and juicy burgers requires a huge livestock industry, with nearly 90 million head of cattle in the U.S. in any one year. All those cows mean significant methane emissions.
With estimates from the United Nations that methane accounts for 44 percent of all greenhouse gas emissions from livestock production, and new determination – including legislation in California – to reduce methane emissions from farms, we need to figure out how to quantify and then reduce those emissions….
California is taking its fight against global warming to the farm
By TERENCE CHEA, Associated Press Nov 29 2016
GALT, Calif. (AP) — California is taking its fight against global warming to the farm. The nation’s leading agricultural state is now targeting greenhouse gases produced by dairy cows and other livestock.
Despite strong opposition from farmers, Gov. Jerry Brown signed legislation in September that for the first time regulates heat-trapping gases from livestock operations and landfills. Cattle and other farm animals are major sources of methane, a greenhouse gas many times more potent than carbon dioxide as a heat-trapping gas. Methane is released when they belch, pass gas and make manure.
“If we can reduce emissions of methane, we can really help to slow global warming,” said Ryan McCarthy, a science advisor for the California Air Resources Board, which is drawing up rules to implement the new law.
Livestock are responsible for 14.5 percent of human-induced greenhouse gas emissions, with beef and dairy production accounting for the bulk of it, according to a 2013 United Nations report….