Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonHillary Clinton slams Trump for spreading 'sexist trash' about Pelosi Gillibrand seizes on abortion debate to jump-start campaign DNC boss says candidates to be involved in debate lottery MORE said she feels bad for the young people who believe what rival Bernie SandersBernie SandersGillibrand seizes on abortion debate to jump-start campaign DNC boss says candidates to be involved in debate lottery CEO pay rising twice as fast as worker pay: AP MORE says about her taking money from the fossil fuel industry.

"I feel sorry sometimes for the young people who believe this, they don't do their own research," Clinton said Sunday on NBC's "Meet the Press."

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"And I'm glad we now can point to reliable independent analysis to say no, it's just not true."

Clinton last week accused the Sanders campaign of lying about her taking donations from the fossil fuel industry.

“I am so sick of the Sanders campaign lying about me. I’m sick of it,” the former first lady said last week.

On Sunday, Clinton said she cares "passionately" about climate change and has been working to try to move us away from fossil fuels for many years. She said Sanders claims about her taking money from the fossil fuel industry have been "debunked."

"When people make these kinds of claims, which now I think have been debunked — Actually the Washington Post said 'Three Pinocchios' — and the New York Times analyzed it. Independent analysts have said that they are misrepresenting my record," she said.

The Washington Post gave Sanders's claim Three Pinocchios in its fact check, saying that the Vermont senator exaggerated the contributions Clinton received from the oil and gas industry, saying "in the context of her overall campaign, the contributions are hardly significant."

Sanders on Sunday defended the claim.

"I don't think that we are distorting reality," he said on CNN's "State of the Union." "That's the simple reality."