An estimated 2.4 billion people do not have access to basic sanitation facilities, while 1.1 billion people do not have access to safe drinking water. By 2015, countries across the world have pledged to provide another 1.5 billion people with access to improved drinking water, and another 1.9 billion people with access to basic sanitation facilities. Now, the Swiss Tropical Institute, in a report commissioned by the World Health Organisation (WHO), has outlined the significant economic benefits to the world, and particularly to developing countries, if the Millennium Development (MDG) and World Summit on Sustainable Development goals are met. People with access to safer, cleaner and healthier water and sanitation facilities would become sick less often.