According to the World Health Organization (WHO), Vietnam is among the 25 countries in the world with the greatest number of road fatalities per capita. A recent WHO report states the country has over 24 road fatalities per 100,000 inhabitants per year, resulting from dense and long-lasting traffic patterns dominated by motorbikes. The rise in motorbikes has also brought a significant rise in air pollution. A 2012 study released during the World Economic Forum in Davos listed Vietnam among the top 10 countries with the worst air quality, and Hanoi as the most polluted city in Southeast Asia.