The state of California has set big goals for switching over to green energy within the next decade. The difference with these energy source, they depend on the weather. Water (hydro energy), wind (wind turbines), and sun (solar energy) are the key components to generating renewable energy. In California, lawmakers have set high standards for how green we want to be in the next 10 to 20 years. The goal is to have switched over 33% of the state to renewable energy sources by 2020 and half of the state by 2030.