Urbanization is one of the leading global trends of the 21 st century that has a significant impact on health. Today around 55% of the world’s population lives in urban areas, a proportion that is expected to be increase of 68% by 2050. As most future urban growth will take place in developing cities, the world today has a unique opportunity to guide urbanization and other major urban development trends in a way which protects and promotes health. These include several across Sub-Saharan Africa, Asia, Pacific Island States, and Guyana in Latin America. COVID-19 has changed the face of cities, a huge economic shock and recast urban life globally. Starting with China, a majority of countries has adopted some version of a lockdown with all social activity. In India, the lockdown started across the country on March 24 and is still ongoing. The disease’s worst effects are closely linked with urban areas, where the death rates tend to be higher because of a complex combination of factors,...

An interesting review report on “A critical review of the application of electromagnetic fields for scaling control in water systems: mechanisms, characterization, and operation” was reported by Lu Lin, Wenbin Jiang, Xuesong Xu and Pei Xu published in Nature Partner Journals Clean Water published on June 2020 [1] .   Water is the precious matter in the world. source U.S. General Services Administration has interested on non-chemical water treatment technologies. It has mentioned following important points: n on-chemical technology promises to increase the period between required blow-down cycles, thus reducing water consumption , minimizes associated issues of chemical storage, handling, and disposal, and may permit on-site re-use of cooling-tower “blow-down” water as “grey water” , it promises to be life cycle cost effective based solely on the reduction in chemical costs , this technology may reduce or eliminate chemical costs, it may not reduce other contractor costs ...