Germany is a member of the European Union, had adopted highly ambitious production targets for renewable energy, and equally ambitious reduction targets for CO₂ emissions, down at least 20 percent from 1990 levels. Germany is leading the way in developing “green” technologies and has the most ambitious energy-saving program in
Europe. So, German people concerned to reduce the cause of carbon dioxide, such as they use a bicycle for transportation between city and they use solar cell instead electricity.