Looking more into this, I'm surprised I haven't heard of this before.
The low-down, according to the Biden admin (this is part of BBB): "In addition, the framework will create a new Civilian Climate Corps - with over 300,000 members that look like America. This diverse new workforce will protect our public lands, bolster community resilience, and address the changing climate, all while putting good-paying union jobs within reach for more Americans."
Apparently this seems to have been one thing that major climate activist groups like Sunrise Movement were trying to push for. I, for one, have to wonder if they would even be capable of getting 300,000 employees should this pass.
Worth noting also that I can't find total agreement on how much the CCC is getting in funding. Gaetz suggests just the $2 billion but I've seen people make estimates as high as $30 billion.