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EDF, Google Earth Outreach, the University of Texas at Austin and Aclima teamed up to generate air pollution maps. Here's how we got our data.

Leaked natural gas – mostly methane – is a major contributor to climate change. Our readings indicated an average of one leak for every two miles we drove within the study area.

The program will embed fellows into both the public and private sectors to identify energy solutions

About 50% of the gas mains in Dallas are more than 50 years old. We found one leak for every four miles we drove.

Florida has taken steps to reduce leak-prone pipes in its gas system, but there's still more to do. We found one leak for every nine miles in Jacksonville.

Since 2007, EDF has been in India working with local partners to provide tools for implementing market-based solutions to tough environmental challenges.

Like numerous older gas systems in the country, Chicago has a high prevalence of cast iron and leak prone pipes.

We mapped methane leaks in Pasadena, Chino, Inglewood, and Orange CA. More than 38% of the pipes in the areas mapped are more than 50 years old.

The EDF Climate Corps fellowship program has attracted leading organizations to host the 2015 EDF Climate Corps fellows to cut costs and carbon emissions.

Approximately 7% of Burlington, Vermont's pipes are more than 50 years old.

Like numerous older gas systems in the country, Syracuse has a high prevalence of cast iron and leak prone pipes.

Thousands of small natural gas leaks under city streets and sidewalks add up to a major climate threat.

We have detailed recommendations on how to stop natural gas leaks, but the basic challenges are straightforward, and you can help tackle them.

Utilities and regulators have opportunities to decrease damage to the climate by reducing natural gas leaks. Here are four steps to help achieve that.

One of the nation's oldest major cities, Boston's aging natural gas pipes are prone to corrosion and leaks.

Indianapolis has emerged as a leader in preventing harmful methane leaks, thanks to the efforts of the city and Citizens Energy Group.

Citizens Energy Group's unique structure, aggressive pipeline replacement program, and pipeline integrity program have helped reduce methane leakage.

Staten Island has widespread leaks of methane from natural gas infrastructure and pipelines.

EDF and Google Earth Outreach spent two years developing systems to measure methane leakage in city distribution systems.

EDF and Google Earth Outreach's pilot project uses new sensing and analytical technologies to measure urban gas leaks that contribute to climate change.

How EDF, Google Earth Outreach and Colorado State University developed a new way to locate and estimate the climate impact of methane leaks.

In the village and in the field: Helping India's farmers fight the effects of climate change

Learn about EDF's partnership with Brazilian rubber tapper and land rights leader Chico Mendes, and his work on forest preservation in the Amazon.