A single plant is carbon neutral over its entire growth/decomposition cycle, yes. But the ecosystem as a whole, plants grow faster than they decompose, and it i

A single plant is carbon neutral over its entire growth/decomposition cycle, yes. But the ecosystem as a whole, plants grow faster than they decompose, and it is carbon negative. The excess oxygen production is balanced by animals and fire. So yes, we can make plants more carbon negative by slowing decomposition, and by cutting them down when growth rates slow making room for new plants. Bury the stuff, sink it in the ocean, build wooden things, use it as a component of other manufacturing materials. Just add land and water, which seems to be the problem.