If you build an additional 5000 units then you could still use that to offset 5000 units of coal. You can keep doing this until there is no coal left. When th

If you build an additional 5000 units then you could still use that to offset 5000 units of coal. You can keep doing this until there is no coal left. When there is no coal power, and no gas power, and no oil power, then finally you are right. How is this point not clear?