Finnish people hold banners and ring alarms during a protest to demand developed countries' greenhouse gas emission reduction in Helsinki, Dec. 12, 2009. People in 12 different cities in Finland protested on Saturday against developed countries' greenhouse gas emission and demand the reduction by 40 percents in 2020 compared with the emission volume of the year 1990 as well as an annual 110-billion-euro aide for developing countries. [Zhao Changchun/Xinhua]