Lead-acid batteries are widely used on a mass-scale in all parts of the world. They act as power sources in a wide-range of equipment and appliances used by households, commerce and industry. Lead-acid batteries finds wide application in all modes of modern transport including cars, trucks, buses, boats, trains, rapid mass-transit systems, recreational vehicles etc. During power-cuts, lead-acid batteries provide emergency power for critical operations such as air-traffic control towers, hospitals, railroad crossings, military installations, submarines, and weapons systems. All automotive batteries and 95 percent of industrial batteries are lead-acid secondary cells. Harmful Impacts of Batteries Lead-acid batteries contain sulphuric acid and … Continue reading →
Anthropogenic climatic change is adversely affecting our health which is becoming more severe with each passing year. As per conservative estimates, climate change causes more than 150,000 additional deaths per year. Climate change is threatening public health in general. The population of developing countries, arid regions, coastal areas, mountains and Polar regions are the most exposed to experiencing negative health effects associated with climate change. Children and elderly, especially in poor countries, are the most vulnerable groups. Heat Wave Researches confirm that the average temperature will increase in the Middle East up to 2°C by 2050; therefore, the frequency of heat waves … Continue reading →
Water pollution has become a major concern worldwide, especially in developing countries where around 3.2 million children die each year as a result of unsafe drinking water and poor sanitation. Access to adequate wastewater treatment facilities in the developing countries is very limited. For example, only 209 of India's 3,119 towns and cities—less than one in ten—have even partial sewage systems and treatment facilities. As a result water bodies in developing nations are often used as open sewers for human waste products and garbage, which is evident at the Ganges River in India which receives over 1.3 billion liters of domestic waste, … Continue reading →
Natural ventilation is a method of allowing fresh outdoor air into indoor living spaces by natural means without the use of air conditioning units and other types of mechanically driven devices. It is the process of changing or replacing stale or noxious air with fresh air in any space to provide high indoor air quality to control temperature, replenish oxygen, remove moisture, odors, smoke, heat, dust, airborne bacteria and carbon dioxide. Ventilation is important as it reduces unhealthy air pollutants, such as formaldehyde and radon. It reduces excessive moisture and humidity levels, which can lead to mold growth and can … Continue reading →
Fracking, or Hydraulic Fracturing, is a method to stimulate or improve fluid flow from rocks in the subsurface. Advancements in extraction technologies have enabled drillers to reach previously inaccessible gas in geological formations The technique involves pumping water-rich fluid into a borehole until the fluid pressure at depth causes the rock to fracture. The pumped fluid contains small particles, such as quartz-rich sand or chemicals, which serve to prop open the fractures. After the fracking job, the pressure in the well is dropped and the water containing released natural gas flows back to the well head at the surface. Fracking … Continue reading →
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