Somethings not right with Bulbs gas

Bulb state on the website that our gas is 100% carbon neutral. 10% is green gas produced from renewable sources like food or farm waste. And we offset the rest of the gas we supply by supporting carbon reduction projects around the world.
But this doesn’t add up. Bulb clearly claim, in the statement quoted above, that they offset 90% of the gas, and burning green gas still produces carbon, then how can Bulb be carbon neutral?

So-called “green gas” absorbs carbon as it is produced, and then releases the same amount of carbon upon combustion, meaning it is already carbon-neutral by definition and doesn’t need to be offset.

Edit: Not entirely sure where you’re getting your 90% offset figure from.

The 90% comes from the offsetting activities undertaken for the non green gas used

By this logic you would be happy if your renewable electricity was created by burning wood as that is a renewable and carbon neutral fuel.

GENeco have a nice explanation of how their Bristol sewage treatment works (which is down as one of Bulbs generators)

Yes. I was answering your question, not agreeing with the logic.

Biomass is already part of the UK electricity fuel mix and, yes, is counted as renewable.