Michigan is surrounded by five of the Great Lakes and has forests of pine trees used for building materials. The state also has fertile farmland and reserves of oil and natural gas. However, these resources are being depleted and overused in ways that risk damaging the environment and making the resources unusable for future generations. Forests are being cut down too quickly, fertile soil is being overused without replenishing nutrients, and fossil fuel reserves are finite and being consumed at unsustainable rates.