Hillary Clinton produced a serious carbon footprint today while working a rope line in New York.

After the Democratic front runner had just finished a rally at the SUNY Purchase campus, she got into a shouting match with a Greenpeace activist:

“Thank you for talking about climate change,” the woman off camera said in the video released by Greenpeace. She then asked the candidate if she would go back on her word and not have “fossil fuel money” in her campaign.

“I do not have — I have money from people who work for fossil fuel companies — I am so sick,” Clinton said, the smile long gone from her face.

“I am so sick of the Sanders campaign lying about me! I’m sick of it!” Clinton yelled, pointing in the woman’s face.

Greenpeace posted with the video, “At a Hillary Clinton rally at SUNY Purchase campus today, the presidential candidate lost her patience with a Greenpeace activist who thanked her for her commitment to climate change then asked her whether she’ll reject fossil fuel money moving forward. Pointing her finger at activist Eva Resnick-Day, Clinton claimed she only takes money from people who work for fossil fuel companies and called the accusations lies.”