Chris Evans and Mark Ruffalo, who have been in Atlanta for "Avengers" action lately, paused to honor real super heroes: those working to make Atlanta eco-friendlier during ATL100. The city-wide campaign highlights efforts to embrace renewable energy solutions.

“We can do amazing things. We have the technology to do it,” Ruffalo said during a kickoff at the Plaza Theatre this week. The wind is in our sails economically, and it just takes us going out to the world and telling everybody the good news. We don’t need fossil fuels anymore. Clean energy from wind, water and sun is the fastest way to our freedom. Whoever controls your energy controls your life (and) controls your destiny. This is how way we take back our destiny, by giving energy to each and every community and letting them make, store, and sell their own energy as they see fit.”

Evans appeared in a video tribute to salute environmental warriors, noting, “I only play a super hero on screen.”

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Ruffalo joined Solutions Project Executive Director Sarah Shanley Hope, who challenged the crowd to dream big.

“What if we powered our lives with 100 percent wind, water and sun? What if we as a city set about to make that which seems impossible happen, right here and now?” she said. “What if in our commitment to 100 percent clean, renewable energy we led the country with a plan that ensured the principles of equity—access, affordability, opportunity for those most vulnerable—lit that path for all of us?”

She noted Atlanta’s unique position of leadership on environmental issues.

“It is no accident that the birthplace of the civil rights movement is also a leader in the fight for clean energy for all,” she said. “Clean energy is a civil rights issue. The dirty energy industry’s assault on our bodies and climate causes the most violent harm in communities of color across Atlanta, Georgia, the South and our country.”

Marvel’s “Avengers: Infinity War” has been filming in Atlanta. Following a break, work has begun on the next “Avengers” installment.