The Government should first ensure the safety of people’s drinking water. For example, China has adopted an amazing water conservation project(Sourth-North Water Transfer Project),is a multi-decade infrastructure mega-project in the People’s Republic of China. Ultimately it aims to channel 44.8 billion cubic meters of fresh water annually from the Yangtze River in southern China to the more arid and industrialized north through three canal systems.

Infectious diseases
Communicable-diseases can spread from one person to another by direct/indirect. Today there are several emerging infectious like COVID-19,Ebola,H1N1
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