Actor Mark Ruffalo says we owe it to our children to support the $16 trillion Green New Deal proposal Sen. Bernie Sanders (I-VT) rolled out this week.

The Avengers star — an outspoken champion of left-wing causes — expressed support for the socialist senator’s multi-trillion dollar proposal and told his 6 million Twitter followers Thursday that we owe it to our children to support plans as “bold” as Sanders’, despite the financial toll it will take on future generations.

“When I look in the faces of my children and the thousands of children I have come into contact with the Avengers, I can’t help but feel that bold plans like this are what they are owed in the face of what is coming,” Mark Ruffalo said.

“We need a plan and we need action. We are running out of time,” he warned. “This kind of plan creates jobs and a world that makes those jobs meaningful.”

We need a plan and we need action. We are running out of time. This kind of plan creates jobs and a world that makes those jobs meaningful. — Mark Ruffalo (@MarkRuffalo) August 22, 2019

We must be honest with ourselves about these realities. #ClimateChange is real, massive, and deserves a kind of peaceful mobilization on par with one that we would mount against an offending nation. — Mark Ruffalo (@MarkRuffalo) August 22, 2019

Sanders’ plan calls for a $16.3 trillion public investment, covering everything from the full decarbonization of the transportation sector to “tribal land access and extension programs” to the expansion of existing entitlement programs. It promises to beef up the Low-Income Home Energy Assistance Program (LIHEAP) by $25 billion and the Supplemental Nutrition Assistance Program (SNAP) by $311 billion.

The 77-year-old White House hopeful’s plan also promises to “prosecute and sue the fossil fuel industry for the damage it has caused” — a sentiment he repeated in a tweet Thursday.

Fossil fuel executives should be criminally prosecuted for the destruction they have knowingly caused. #GreenNewDeal — Bernie Sanders (@BernieSanders) August 22, 2019

Ruffalo’s support of Sanders’ Green New Deal proposal does not come as a surprise, as he has often expressed his left-wing views, particularly on climate change, to his millions of fans on social media.

#FBF to this amazing sign a fan made. We still have so much to do to combat #ClimateChange. Get familiar with the #GreenNewDeal now before it’s too late: https://t.co/ePbwulCoXN pic.twitter.com/WL19mL7Tfn — Mark Ruffalo (@MarkRuffalo) February 8, 2019