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How Climate Friendly is Bike Sharing? It’s Complicated

There's a lot scientists don't know about how bike sharing programs encourage less driving.

Keystone XL Will Spike Oil Demand and CO2, Study Says

New study says the State Department may have greatly underestimated Keystone XL's CO2 emissions.

For Canada, Tar Sands Are Bigger Than Keystone XL

For Canada, the tar sands' future hinges on the economic opportunity to bring oil reserves to market.

See Power Plants Most Vulnerable to Flooding

A new mapping tool shows how floods could drown some of the nation’s most critical power plants.

Waiting to Slash CO2 Emissions? It Could Cost You

The cost of delayed action on climate change could spike if no action is taken, the White House says.

6 Degrees: Star Wars, Energy Ranks, Cool Pics & More

Find out what you missed in climate news this week in our 6 Degrees weekly roundup.

Court Ruling May Reverberate on ‘Social Cost’ of Carbon

The climate costs of carbon emissions from any new fossil fuel project on public land will have to be calculated.

So You Think You Know Renewables? Take the Quiz

Though renewables have advanced since they were invented, it might surprise how long they've been around.

6 Degrees: Hot Summers, a Few Tornadoes & Cows, Pigs

Summers get hotter, tornado season fizzles, cow manure worsens methane, plan to cut CO2 and more.

Measuring Cow & Pig Emissions Goes to New Heights

Methane emissions from cows and pigs had a surprisingly large impact on climate change.

U.S. Public Lands Fading As Fossil Fuels Source

Fossil fuels are shifting away from national forests and other public lands because of coincidence of geology.

New Report Outlines ‘Pathways’ to Cut CO2 Emissions

There are pathways to reduce CO2 emissions and meet a key climate target but time is running out.

Engineers Warn UK Infrastructure at Risk from Climate

Engineers warn more unpredictable weather will bring serious challenges to infrastructure.

North Dakota, Texas Send U.S. Oil Boom Skyrocketing

The U.S. is amid a CO2-heavy crude oil boom mainly because of fracking in two states — Texas and North Dakota.

Fracked Oil, Gas Well Defects Leading to Methane Leaks

A Cornell University study says shale gas well defects lead to methane leaks in Pennsylvania.

Basis for EPA Clean Power Plan Cuts a ‘Mystery’

The biggest CO2 emitter won’t need to make the biggest emissions cuts under the EPA's Clean Power Plan.

World Bank: Tackling Climate Will Grow the Economy

Findings put to rest claims that the world could not afford to act on climate change.

Climate Change Puts World’s Energy Systems at Risk

Generators from nuclear reactors & coal-fired power plants will feel the brunt of weather changes, report says.

EPA Starts Taking Comments on Clean Power Plan

The EPA is kicking off a four-month public comment period on the Clean Power Plan.

Derelict Oil Wells May Be Major Methane Emitters

A Princeton University study finds that abandoned oil and gas wells could be a major source of methane emissions.

Gallery

Global Warming: It’s Not the Sun Climate change can be natural, but what’s happening now can’t be explained by natural forces.