[jdblair]

“your choice of energy input” is carrying a lot of weight in your statement. producing steel from iron ore is extremely energy intensive. it’s true that once produced, recycling steel is less expensive.

but steel doesn’t store carbon (except the small carbon input used to turn iron to steel)

wood, on the other hand, is a carbon sink.

[KSteffensen]

Remember to factor in all the trees that will need to be cut down in order to provide the wood.

Of course, over time we can increase the amount of industrial forest, but that will take 40-50 years.

[bmacho]

That's the whole point, to remove trees from the land, so new trees can grow and extract carbon from the atmosphere.

[mml]

no, wood is not a carbon sink. its gets turned back into co2 as it decomposes.