There were a few carbon capture (CC) projects that were genuine, shoutout to the guys at AirMiners, they also have a great community and they're a pretty smart bunch of people.

Downside of CC is it's still too expensive and current methods capture carbon on the order of kilograms/month where gigatons/month is needed. Sure, the tech will improve with time, and there's economies of scale, etc..., but a 10,000,000,000-fold change? Doubt it. Also, there's some fundamental physical limits that you'll hit way before you get close to that throughput. I wouldn't think of them as fraud though, as the people involved (usually) do not lie about what the current state of tech is.

I'd say whatever shows reduction on carbon emissions is a legit thing; far from ideal, but the best thing we have atm.