Hacker News Reader

Its not exactly on-topic, but i had an odd idea last night:

Surface mining (like for coal) pits are often filled with water after use. Would turning them into a dead zone/a bog be sensible to sequester carbon? Could we do the same to larger seas? This could also create peat or brown coal for future generations.

Is that a bad idea? And why?

View on HN

Cost and difficulty versus capture gains probably makes this unfeasible. Making a bog where no bog occurs naturally could be practically impossible.

"Cost" - a truckload of fertilizer? Turning a lake into a dead zone might happen on its own if there is insufficient circulation. Pits for brown coal are likely suitable because they used to be bogs in the past.

Reply on news.ycombinator.com