> I'm not seeing it. What makes it profitable? In the EU (and some other jurisdictions, but the EU is the largest), companies must purchase certificates that a

> I'm not seeing it. What makes it profitable? In the EU (and some other jurisdictions, but the EU is the largest), companies must purchase certificates that allow them to pollute (EU ETS). Such companies could participate in this scheme and maybe generate those certificates - other companies would then have to buy from them, making the whole venture profitable.