
EDP has been consistently and extensively reducing carbon dioxide emissions in recent years. The reduction is essentially based on the strategy of diversifying energy sources, with heavy investment in clean energy such as wind and hydroelectric power. This strategy will contribute to the company's overall policy of reducing specific CO
2 emissions by 70% by 2020, compared with the 2008 reference year, i.e. from 400 to 120 tCO
2/MWh. In addition to the diversification of energy sources, EDP also has been investing in hydroelectric power stations with pumping systems (Baixo Sabor, Foz Tua, Alvito, Carvão Ribeira, expansion of Venda Nova III, expansion of Salamonde II, expansion of Paradela II) that will contribute to greater correlation between wind and hydroelectric generation since it permits the storage of energy generated off-peak for later use during peak hours. EDP is also decommissioning the fuel-fired power stations, which are being replaced by gas-fired power stations, providing a substantial reduction of gas emissions.
Consequently, the electricity generation mix has undergone profound changes in recent years. Wind energy together with the energy generated at hydroelectric power stations is taking on an increasingly important role in Portugal. 2010 is a prime example of this change, with hydroelectric and wind power meeting a large share of consumption