Following that there does not exist an energy source that is zero carbon dioxide emissions. Just mining iron cost a lot of energy, pollutes the environment and

Following that there does not exist an energy source that is zero carbon dioxide emissions. Just mining iron cost a lot of energy, pollutes the environment and cost a lot of energy. All current built wind and solar panels that include steel are built using processes that burn fossil fuel. If we look at plastic used in those the picture get even worse.