[detritus]

Not OP, who's already answered, but I was idly thinking about this earlier today.

I'd fund a side concern that grew trees to couple-of year-mature sapling level, for planting either commercially or for CO2 absorption. The former hopefully funding the latter.

it's come up a lot in the news recently - the whole 'plant trees, save the planet' thing - but it's genuinely something I've wanted to do for years. Here in urban UK we cut down trees way more than we put them back up again.