Another day, another TV ad from Sen. Bernie Sanders, this time with a focus on fracking – a hot topic in New York not that long ago, which galvanized a group of advocates (AKA, the fracktvists), many of whom remain active in politics and are now Sanders supporters.

The ad maintains Sanders is the only presidential candidate who would ban the controversial natural gas drilling technique “everywhere.” He focused on this issue while appearing earlier today for a campaign event in Binghamton in New York’s Southern Tier, which was ground zero in the fracking debate.

“The growing body of evidence tells us that fracking is a danger to our water supply, our most precious resource,” Sanders told some 5,000 supporters who packed the Veterans Memorial Arena to hear him speak. “It is a danger to the air we breathe. It has resulted in more earthquakes. It is highly explosive. And it is contributing to climate change.”

Sanders’ home state of Vermont has adopted a fracking ban, as has New York – after more than five years of heated debate and foot-dragging by the Cuomo administration. In Binghamton, Sanders applauded Cuomo for finally coming down on the side of the fracktivist community against big oil, but he also said that if we are “serious” about combatting climate change and protecting the environment, then federal officials will ban fracking across the nation.

Sanders noted that his primary opponent, Hillary Clinton, promoted fracking overseas while she was serving as secretary of state in the Obama administration. Sanders and his supporters have been pressuring Clinton for her campaign cash ties to big oil. (Remember this incident?)

President Obama is a natural gas booster, though his administration did issue tighter fracking rules in 2015, which were immediately challenged in court by the gas industry. Environmentalists weren’t thrilled with the new rules, either.

Sanders’ new ad – the third her has released in as many days in New York as the April 19 primary draws near – is narrated by actress Susan Sarandon. The candidate also has the support of actor Mark Ruffalo, an outspoken anti-fracking activist who made numerous lobbying trips to the state Capitol during the drilling debate.