Democratic presidential candidate Bernie Sanders.

Democratic presidential candidate Bernie Sanders has called for a nationwide ban on hydraulic fracturing.

At a campaign event in Binghmaton, New York on Monday Sanders applauded a fracking ban signed into law by New York State in 2014  and called for a national moratorium on the practice, the New York Times said.

“The growing body of evidence tells us that fracking is a danger to our water supply, our most precious resource. 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 said.

Vermont, where Sanders has served as a U.S. Senator since 2007, instituted the first fracking ban in the nation in 2012.

During the Binghamton event, Sanders criticized his rival Hilary Clinton for her “late” opposition to the Keystone XL pipeline and her efforts to promote hydraulic fracturing operations abroad while she served as U.S. Secretary of State , the NY Times said.

President Obama rejected the Keystone XL project in November after a seven year long review, citing a State Department assessment that said the project would not “serve the national interest.”

Calgary-based TransCanada said in January that it intends to file a lawsuit contesting the rejection.

Clinton, a former U.S. Senator of New York, called for tighter regulations on hydraulic fracturing during the Democratic debate in Flint, Michigan earlier this year but has not proposed an outright ban.

Clinton’s energy platform has so far focused on using booming U.S. natural gas production to “transition to a clean energy economy.”

The Sanders campaign also released a new ad on Monday voiced by actress Susan Sarandon further touting his opposition to hydraulic fracturing.

“Do Washington politicians side with polluters over families? They sure do because big oil pumps millions into their campaigns” Sarandon said in ad.