Steam explosion pretreatment is a method used to make plant material easier to break down for biofuel production. It helps to separate the different parts of the plant, like cellulose and lignin, making it easier to turn into fuel. However, there are some challenges with this method, like not removing enough lignin and not getting enough sugar from the plant material. To solve this, researchers suggest using a two-step process: first, use steam explosion to break down the plant material, then use another method to remove more lignin and get more sugar. This could make the process more efficient and environmentally friendly.