Almost 1 billion trees planted, in a single day
news.bbc.co.uk
news.bbc.co.uk
It slightly unfortunate, but I doubt it could scale to work in the US. That would come out to paying each individual ~ $30 per day (guessing that an equivelant amount of vegetables would be roughly $5 per day, not based on any hard numbers), so this project would cost some place in the range of $1 million per day, before any kind of overhead, just for paying all of the people.
Maybe there's a "do-gooder" entrepreneurial opportunity: show poor people how much fun vegetables can be.
That implies combustion which doesn't occur.
I would really like to see government funded sustainable farming initiatives. Some sort of plan which involves creating sustainable (meaning cycling crops over the course of several years, long term plans that create soil that is fertile and usable to continue growing in, and the like) farms, with the intent that they be at least somewhat self-sufficient. I don't know the logistics behind it, but I would think it should be more than possible for large scale, self sufficient farms, using environmentally helpful methods, and planting things that aren't necessarily selected for maximum yield, but for maximizing the (positive) impact on the surrounding environment.
I could have gone off on how planting trees barely deals with the quantity, but the essential difference between long term storage in fossils and short term storage in organic material is often missed, and I thought it might be interesting to call this to the attention of HNers. However, apparently I lose karma points for this instead.
Sadly, using solar power does little to help with the global warming problem. The Sun is only a temporary power source; as soon as the hydrogen runs out it will stop supplying energy to the Earth. Since we use energy, what we really need to do to stop using as much energy. Sadly, this takes a really long time, and is really hard.
Hell, you even mention "what we really need to do to restore the carbon cycle is put the carbon back into fossils". How exactly do you propose doing that, other than creating something which fossilizes, like trees?
Now, IANAE, but from what I know the threat of global warming is that it comes with a cascade effect, that as it becomes more of a problem, the natural systems in place start giving way, making it become more of a problem faster (For example, as glaciers and ice fields melt, they release carbon and other gasses that had been locked in the ice, causing more warming). Doing something, anything to put that on hold sounds like a good idea to me.
Planting trees may not be the end-all solution to global warming, but it is the best Phase-1 of a long term reduction of carbon in the atmosphere that we have right now. You agree there isn't a current way to go from carbon in atmosphere-> carbon in long term storage (except for the "fake tree" thing, which simply shoves it into depleted oil deposits, which I think is a terrible idea).