Reporting from COP23 in Bonn, Germany, Democracy Now! travels to the nearby blockade of the Hambach coal mine, the largest open-pit coal mine in Europe. Activists say the mine extracts an extremely dirty form of coal called lignite, also known as brown coal, which causes the highest CO2 emissions of any type of coal when burned. For more than five years, they have been fighting to shut down the mine and to save the remaining forest from being cut down to make way for the expanding project. Only 10 percent of the ancient forest remains.