-Iron was smelted by using charcoal, charring of wood in a kiln. This method was reliable, but it subverted a lot of England's forests
- Iron was produced in small quantities and was every expensive
After the revolution
-Abraham Darby discovered a new way to make pig iron with coke as fuel. At first this method of processing iron produced iron that were impure, so it was impossible for forge masters to turn it into tools and goods. Improvements later improved the quality by using more advanced techniques.
- Using coke was increased the quantity of iron produced, decreased the cost, and environmental friendly