The causes include unsafe water, lack of sanitation, poor hygiene practices and indoor and outdoor pollution, as well as injuries.
The new numbers equate to these pollutants being the cause of one in four deaths of children 1 month to 5 years old.
One new report highlights that the most common causes of child death are preventable through interventions already available to the communities most affected. These causes are diarrhea, malaria and pneumonia, which can be prevented using insecticide-treated bed nets, clean cooking fuels and improved access to clean water.
