Christopher Cattle Growing furniture isn't going to save the planet, but it can be used to demonstrate that it is possible to create genuinely useful things without adding to the pollution that industry inevitably seems to produce. Trees are self-generating, and grown wooden products need only the energy that the sun gives everywhere. It's free and it's non-polluting. Training and grafting trees as they grow are established traditional crafts, and wood is durable but it's also biodegradable, so it doesn't have to end up in a hole in the ground. I call this Grownup furniture as it's the result of mature thinking. 
So let's do whatever we can to encourage the revival of such simple and ecologically sound methods, and to promote and encourage new thought along these lines.