That's a very good question and one of the ones that the quantum computer might help us to answer.
What's the nitrogen fixation problem? It's turning what we get out of the ground into fertilizers that are useful, and it turns out that takes about 3% or 4% of the energy budget of the world. If we can improve this by 50%, we can reduce the energy budget of the world by a few per cent, which would make a dramatic impact on things like global warming.