Climate change policy presents challenges for scientists, politicians, business, and society. It requires achieving environmental goals through economic means such as low carbon technologies and lifestyle changes. The European Union has set goals of reducing emissions 20% by 2020 compared to 1990 levels, with the EU Emissions Trading System aiming for a 21% reduction and the non-ETS sector targeting a 10% decrease. Climate change financial instruments can help invest in renewables, energy efficiency, and reducing greenhouse gas emissions to meet targets and transition to a low carbon economy.