This is a great primer for those interested in energy and it dispels a few important assumptions that people hold. My favourites:

1. It's easy to substitute one type of energy for another.

2. Renewable energy is available in essentially unlimited supply.

3. Oil will "run out" because it is limited in supply and non-renewable.

Together these three lead some to foresee an inevitable transition to renewables that can be achieved without much forward planning. This is far from guaranteed and it's dangerous to assume that building a new energy economy will look after itself. The lock in effects of infrastructure built today and the long lead times to build new infrastructure mean there are real costs in making the transition. There are big opportunities too, but the conversation has to start from realism.