Adverse air quality can kill many organisms including humans. Ozone pollution can cause respiratory disease , cardiovascular disease , throat inflammation, chest pain, and congestion . Water pollution causes approximately 14,000 deaths per day, mostly due to contamination of drinking water by untreated sewage in developing countries . An estimated 500 million Indians have no access to a proper toilet,   Over ten million people in India fell ill with waterborne illnesses in 2013, and 1,535 people died, most of them children.  Nearly 500 million Chinese lack access to safe drinking water.  A 2010 analysis estimated that million people died prematurely each year in China because of air pollution.  The WHO estimated in 2007 that air pollution causes half a million deaths per year in India.  Studies have estimated that the number of people killed annually in the United States could be over 50,000. 
The editors do not wish to publish papers that describe results from routine surveys and monitoring programs that are primarily of local or regional interest. Descriptions of well-known pollutants, such as legacy pollutants, in yet another location are not of interest. Papers about sewage, waste and wastewater treatment and management as well as standard techniques in agronomy, remediation, biomonitoring, bioremediation and phytoremediation are not acceptable. However, papers on innovative techniques to combat regional or global problems are welcome; however, technical studies must show their field applicability.
For the ten years following 1965, Tokyo's air was polluted mainly by the smoke from factories. This air pollution was remarkably improved by carrying out countermeasures against fixed emission sources, such as strict control of air pollutant sources, including boilers, and use of higher quality fuel.
Subsequently, the Environmental Quality Standards regarding nitrogen dioxide and suspended particulate matter were not sufficiently met and this unfortunately continued mainly because of steadily increasing automobile traffic and the fumes emitted by diesel-powered vehicles. In October 2003, ahead of the Japanese Government, Tokyo Metropolitan Government (TMG) started to restrict diesel-powered vehicles in collaboration with the eight local governments in the Kanto district. Since then, concentrations of suspended particulate matter have been significantly improved and related Environmental Quality Standards have almost been met. Thus, the atmospheric environment in Tokyo has been steadily improving over recent years.
However, measures to cope with photochemical oxidants and air-pollution controls in effect in the coastal areas of Tokyo Bay are just some of the outstanding issues at play.
In order to realize the cleanest air among the world's largest cities, we will fortify actions to deal with such issues and otherwise strive to respond to these new challenges,such as measures to cope with fine particulate matter (PM ).