Many Vietnamese use mopeds for transportation, since they are relatively cheap and easy to operate. Their large numbers have been known to cause traffic congestion and air pollution in Vietnam. In the capital city alone, the number of mopeds increased from 0.5 million in 2001 to 4.7 million in 2013. With rapid development, factories have sprung up which indirectly pollute the air and water. An example is the 2016 Vietnam marine life disaster caused by the Formosa Ha Tinh Steel Company illegally discharging toxic industrial waste into the ocean. This killed many fish and destroyed marine habitats in Vietnamese waters, resulting in major losses to the country's economy. The government is intervening and attempting solutions to decrease air pollution by decreasing the number of motorcycles while increasing public transportation. It has introduced more regulations for waste handling by factories. Although the authorities also have schedules for collecting different types of waste, waste disposal is another problem caused by urbanisation. The amount of solid waste generated in urban areas of Vietnam has increased by more than 200% from 2003 to 2008. Industrial solid waste accounted for 181% of that increase. One of the government's efforts includes attempting to promote campaigns that encourage locals to sort household waste, since waste sorting is still not practised by most of Vietnamese society.