domain •••com

It's not worthless. If you wait long enough and the planet goes to and carbon markets become a necessary reality, then this could be worth something. If CarbonMarket.com is a $50K name then this might be a $1-2K name.

I think that it would have highest value if cap and trade evolves as a major way to deal with the climate change crisis. It would be almost perfect for a marketplace where carbon offsets are traded. A European one might even prefer the hyphen. I find it hard to predict a price or probability of sale, but perhaps low $$$$ (don't rely much on my opinion). I've not looked into the names the current places to trade carbon are using. Best wishes for it.
Bob