Environment
After its quick industrial growth, Italy took a long time to confront its environmental problems. After several improvements, it now ranks 84th in the world for ecological sustainability. National parks cover about five percent of the country. In the last decade, Italy has become one of the world's leading producers of renewable energy, ranking as the world’s fourth largest holder of installed solar energy capacity and the sixth largest holder of wind power capacity in 2010. Renewable energies now make up about 12% of the total primary and final energy consumption in Italy, with a future target share set at 17% for the year 2020. However, air pollution remains a severe problem, especially in the industrialised north, reaching the tenth highest level worldwide of industrial carbon dioxide emissions in the 1990s. Italy is the twelfth largest carbon dioxide producer. Extensive traffic and congestion in the largest metropolitan areas continue to cause severe environmental and health issues, even if smog levels have decreased dramatically since the 1970s and 1980s, and the presence of smog is becoming an increasingly rarer phenomenon and levels of sulphur dioxide are decreasing.