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The atmospheric concentration of greenhouse gases hit a record last year, according to the World Meteorological Organization. The concentration of carbon dioxide climbed to 397.7 parts per million, and the warming effect of greenhouse gases rose 36% between 1990 and 2014, the group said

Existing buildings in New York will now face higher standards for the emissions of greenhouse gases by upgrading water heaters, boilers and roofs, among other changes. The goal is to cut greenhouse gas emissions in the city by 7% by 2035.

Utility FirstEnergy, one of the largest emitters of greenhouse gases in the US, has responded to shareholder demands and agreed to reduce its carbon emissions, the New York Times reports. The company - the eighth-biggest emitter of greenhouse gases in the US according to the Greenhouse 100 index - says it will study and report on what it can do to meet President Barack Obama's goal of reducing carbon emissions by 80 percent by 2050.

Today Sprint [NYSE: S] announced it will be one of the first companies to use AirCarbon™, a new carbon-negative material made from greenhouse gas, instead of petroleum, to create plastic products.

Coca-Cola, Target, DuPont, Honeywell and other major companies along with the White House have announced a series of commitments to curb emissions of hydrofluorocarbons (HFCs), potent greenhouse gases used in refrigeration and air conditioning.

President Barack Obama is pushing American companies to abandon the use of a chemical coolant called R-134a in refrigerators, air conditioning systems and other industrial applications. R-134a is in a class of chemicals that can be up to 10,000 times as powerful a greenhouse gas per ounce as carbon dioxide.

Caesars Entertainment and Heinz are among the companies with stellar environmental records, exceeding their sustainability goals. Heinz is consuming 23% less water, creating 23.8% less greenhouse gas emissions and sending 51.2% less solid waste to landfills, while Caesars has reduced greenhouse gases 28 percent, already surpassed its target for reducing water consumption, and achieved LEED certification on every expansion or new building since 2007.

Communities on the frontlines of fossil fuel development are taking a stand against dangerous fossil fuel projects. Take a look at the big fight in the small town of Kalama, Washington. The Chinese government is planning to build the world's largest methanol refinery to convert fracked natural gas to liquid methanol for export to China to make plastics. From a greenhouse gas perspective, this fight is a big deal. The methanol refinery alone would use more natural gas than all industry in Washington combined. Flip it around: If we win this one battle and stop the methanol refinery, we stop the equivalent of doubling industrial natural gas usage in Washington State. While the gas industry tries to spin natural gas as clean, new science shows just the opposite. The bulk of natural gas is methane, a potent greenhouse gas. Methane leakage from gas wells and pipelines led scientists to conclude that fracked gas can be as bad coal for our climate. And it gets worse. Gas production in North America relies heavily on fracking, a process famous for polluting air and water, endangering the health of nearby residents.

Falling coal use in China and the US and a worldwide shift towards renewable energy have kept greenhouse gas emissions level for a second year running, one of the world's leading energy analysts has said.

A Dutch court has ordered the government to cut the country's greenhouse gas emissions by at least 25 percent by 2020 in a groundbreaking climate case that activists hope will set a worldwide precedent.

Worldwide tourism accounted for 8% of global greenhouse gas emissions from 2009 to 2013, new research finds, making the sector a bigger polluter than the construction industry.

Governments have delivered the third major international climate change agreement inside 12 months, thanks to a new global deal to phase out the use of hydrofluorocarbons (HFCs). Nearly 200 countries signed off on the deal to amend the existing Montreal Protocol covering ozone layer-depleting chlorofluorocarbons (CFCs) and extend it to apply to the powerful HFC greenhouse gases commonly used in fridges, air conditioning units and aerosol sprays.

Governments have delivered the third major international climate change agreement inside 12 months, thanks to a new global deal to phase out the use of hydrofluorocarbons (HFCs). Nearly 200 countries signed off on the deal to amend the existing Montreal Protocol covering ozone layer-depleting chlorofluorocarbons (CFCs) and extend it to apply to the powerful HFC greenhouse gases commonly used in fridges, air conditioning units and aerosol sprays.

For years, clean energy advocates have pointed towards hydroelectricity as an important alternative to gas, coal and nuclear power plants. But a new study suggests that the dams and reservoirs commonly associated with this clean energy source are actually pumping a significant amount of carbon emission into the air.

Shell plans to link executive bonuses to greenhouse gas emissions and take other actions to reduce its carbon footprint. In an interview with Reuters, Shell CEO CEO Ben van Beurden said the oil and gas company has "to be at the forefront of the transition" to a low-carbon economy and that means focusing on renewable energy, especially wind and solar, as well as low-carbon biofuels and hydrogen as key growth areas beyond 2020.

Shell plans to link executive bonuses to greenhouse gas emissions and take other actions to reduce its carbon footprint.

Sweden has pledged to achieve carbon neutrality by 2045. The country plans to achieve this goal by cutting 85% of its GHG emissions from 1990 levels, and offsetting the remaining emissions.

Environmental questions about Canada's massive tar sands development have long centered on greenhouse gas emissions. Now there are mounting concerns about the huge volumes of water used by the oil industry and the impact on the vast Mackenzie River Basin.

According to Green Biz, 14 environmental and social resolutions earned at least 40 percent shareholder support, with requests for sustainability reporting tha tincludes greenhouse gas emissions and energy efficiency targts gaining over 40%

Greenhouse gas emissions fell nearly 10 percent from 2005 to 2012, according to the latest national emissions inventory released by the EPA.

California legislators are considering tough emissions proposals that would double buildings' energy efficiency, require 50% renewable energy use by state utilities and halve gasoline consumption by 2030. The oil industry is launching a major PR offensive to derail the effort, but Gov. Jerry Brown says he's determined to implement the policies. "It's absolutely necessary if we are to have any chance of stopping potentially catastrophic changes to our climate system," he said. 

Seattle-Tacoma International Airport. new project providing nearly 600 electric charging stations throughout the airport for ground support equipment (GSE) such as baggage tugs, bag ramps and pushback vehicles. Converting the GSE from fossil fuel to electric, each year the project is projected to save $2.8 million in airline fuel costs and 10,000 tons of greenhouse gas emissions - the equivalent of taking 1,900 cars off the road.