Clean energy achievement prohibits wood, but description mentions gas

I find it odd that the wood burning generator is referred to as a wood gas generator. Wood gas is the process of turning wood into gas, which can then be used to power a car. It was mainly used during WW2 due to fuel shortage and the engine horsepower would be cut in half. It also had to clean solid toxic impurities from the gas, which would otherwise deposit in the engine and breaking it. Most of the gas would be carbon monoxide. There is a theoretical max of 70% of the burn value, which can turn into gas and in reality it would be even less than that.

Why is the wood burning generator not just a wood fired steam engine? It would be a much simpler machine, way less maintenance and likely more fuel efficient.

Changed Status to Fixed

The description will be fixed in the next update, thanks @Coolthulhu!