Germany has undertaken a transition to renewable energy, known as the "Energiewende", to address climate change, improve energy security, and phase out nuclear power. The Energiewende has goals such as reducing greenhouse gas emissions 40% by 2020, having 45% of electricity from renewables by 2025, and cutting energy use in transportation by 40% by 2050. Germany has significantly increased its use of renewable energy for electricity from priority sources like wind and solar power, creating new jobs and economic opportunities in the process. However, there are still challenges to expanding renewable energy use to other sectors and fully modernizing Germany's electricity grid.