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Researchers say there's potentially a "brutally ugly technical fix" for climate change, if the world gets desperate enough. Their idea involves simulating a volcanic eruption by spraying sulfuric acid into the stratosphere, reflecting sunlight away from the planet. 

Cumulative wind-energy installations worldwide may double within five years as falling costs help producers compete with conventional power, according to the industry's biggest manufacturer.

The 14 companies that issued a joint statement Wednesday endorsing international negotiations include leaders from some of the world's most carbon-intensive industries: coal miners BHP Billiton Plc and Rio Tinto Plc; oil majors Royal Dutch Shell Plc and BP Plc; aluminum producer Alcoa Inc.; and the planet's biggest cement-maker, LarfargeHolcim Ltd

Unilever has worked hard to be a sustainable, environmentally conscious business, but whether the $170 billion conglomerate can turn that into profits in today's competitive market remains to be seen, according to this analysis. "Too many companies are running their business into the ground, I would argue, by being myopically short-term focused on the shareholder," said CEO Paul Polman.

Wal-Mart Stores Inc. is expanding its program to clean up the products it sells, setting a 2022 target for reducing potentially harmful substances and widening the list of chemicals it wants to avoid.

The U.K. government miscalculated the costs of renewable-energy support and is likely to overshoot its 7.6 billion-pound ($9.2 billion) annual budget by about a fifth in 2020 and 2021, according to auditors.

Clean power supplied almost all of Germany's power demand for the first time on Sunday, marking a milestone for Chancellor Angela Merkel's "Energiewende" policy to boost renewables while phasing out nuclear and fossil fuels. Solar and wind power peaked at 2 p.m. local time on Sunday, allowing renewables to supply 45.5 gigawatts as demand was 45.8 gigawatts, according to provisional data by Agora Energiewende, a research institute in Berlin. Power prices turned negative during several 15-minute periods yesterday, dropping as low as minus 50 euros ($57) a megawatt-hour, according to data from Epex Spot.

The Congressional Budget Office says the government's spending on disasters could rise from today's $28 billion to $39 billion in current dollars by 2075, when 10 million US residents will be "substantially affected" by climate change. The CBO suggests requiring coastal residents to carry more of the financial burden of their risk, as curtailing emissions might not go far enough to address the problem.

President Barack Obama will have a wide-ranging legacy of environmental action, said Gina McCarthy, administrator of the Environmental Protection Agency. As for the relationship between EPA and Congress, she said, "It's always been a struggle, but it's always been that Republicans and Democrats care about the health of their kids."

Nearly half of the municipal buses on the road around the world will be electric within seven years, with China expected to dominate the global market as it aims to cut urban pollution and support domestic manufacturers.

Drilling has been so intense near Fox Creek that its been linked to a series of earthquakes. One tremor measured 4.6 in magnitude, one of the two biggest human-induced seismic event in Canada's history.