Consider the following statements:

1. First-generation biofuels are made from food sources such as sugar, starch, vegetable oil, or animal fats using conventional technology.

2. Second-generation biofuels are produced from non-food crops or portions of food crops that are not edible and considered as wastes, e.g. stems, husks, wood chips, and fruit skins, and peeling.

3. Third-generation biofuels are produced from micro-organisms like algae.

Which of the above statement is/are incorrect?