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Prime Minister Justin Trudeau and President Barack Obama’s climate announcement on Thursday came at a perilous time.

U.S.-Canada Pact a Step toward a Future Safe from Climate Change – EDF President Fred Krupp

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.

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.