Negative effects of coal and coal mining include:
Destruction of landscapes and habitats, deforestation and erosion, ground water contamination, chemical air and dust pollution, diseases from inhaling coal and greenhouse gas emissions
although hydropower is non polluting the hydropower facilities have negaive impacts on the surrounding environment such as:
preventing fish migrations, changing the water temperature and water flow and a possibility of methane production in reservoirs.
Negative effects of nuclear energy include:
Radioactive material can be released in an accident and radioactive wasted is produced