LED bulbs use about the same amount of energy as CFL bulbs. Figure 23 The use of CFLs is not as effective as it could be. Despite their low energy use, only about 11% of all light bulbs bought around the world are CFLs4, with 82% of bulbs bought being incandescent bulbs5. This is because people prefer the light given off by incandescent bulbs to the light from CFLs; they feel it gives a warmer glow. Research has shown that people prefer the light from incandescent bulbs because it gives off all wavelengths of
Industrialization has led to a huge amount of coal demand, which introduced a new source of air and water pollution in the middle of the 19th century. The resulting smog and soot from the coal combustion had serious health impacts on the residents of growing urban centers. The acid rain, first discovered in the
Manufacturing-led development has caused massive environmental problems in countries such as China and India. Particles in the air, known as aerosols, have been blamed for causing Beijing’s notorious smog. The minuscule particles generated by burning coal or oil are slowly changing the temperature and rain patterns of East Asia said Peking University scientist Lin Jintai, who co-led the study. Compared with greenhouse gasses, the culprit of global warming, aerosol particles remain in the atmosphere for a shorter period of time, and their climate effects are the strongest in the regions where they are emitted, the study said. Another of which is North Korea’s form of government which becomes a threat to the world.
As we know lighting is expensive and in most of the countries it is provided by polluting kerosene. Kerosene lamps are harmful to health and environment. The burning of biomass fuels produces Fumes which can cause eye infections and cataracts. The smoke emitted is equivalent to smoking two packets of cigarettes every day. Martin Riddiford and Jim Reeves, who are London based designers, discovered an inexpensive and safe alternative that will be beneficial to many people across the world - a gravity-powered LED light.
About 90% of the ozone in our atmosphere is contained in the stratosphere. Ozone concentration is higher (about 2 to 8 parts per million) at 12-25 miles (20-40 km). While ozone layer is important to absorb ultraviolet radiations from Sun, man-made fluorocarbon compounds are causing its depletion. The depletion of ozone layer is a dire consequence for the life on
Smog it is type of air pollution, it's a mixture of smoke and fog in the air. It outcome of a big amount of coal burning, and mixture of smoke and sulfur dioxide. In 1950 scientists described a new type of smog known as photochemical smog. It is a very huge problem that people suffer from in their cities because it causes to health problems. (Photochemical smog) it is a brown haze above cities is a mixture of pollutant that comes from the reaction of sunlight with nitrogen oxide and volatile organic compounds (VOCs).There are two types of pollutants.
Air pollution is one of the most common forms of pollution on the planet. A branch of air pollution called Carbon Monoxide pollution is particularly bad for humans and nature. Carbon Monoxide (CO) is a colorless, tasteless, odorless, and toxic air pollutant that is produced with the incomplete combustion of carbon containing fuels. These fuels include gasoline, oil, wood, and natural gas; with the largest source in the U.S being vehicle emissions. Items in households such as unvented kerosene, gas space heaters, leaking chimneys and gas stoves release CO which can effect air quality indoors.
 Dangers of manufacturing nylons: 1) The process of manufacturing nylons increases the abundance of nitrous oxides in the atmosphere and results in destructing the ozone layer. In the 1990’s, it was believed that a nylon plant emission had a global warming effect equal to more than 3% of the UK’s entire carbon dioxide emissions. 2) Health hazards related to nylons’ production such as nasal mucous membranes irritation if exposed to dust and fumes, skin burns if working with un-cooled polyamides and the high probability of experiencing gastric discomfort. .
1. Introduction Hong Kong enjoys a fame as the Pearl of Orient for its spectacular night scene, which is glittered with umpteen neon lights. Though manifesting the economic prosperity, the excessive illumination has aroused an implicit environmental problem: the light pollution. A recent survey by Chun Shing Jason Pun and Chu Wing So (2012) reveals that the average night-sky brightness of Hong Kong is 160 times brighter than a pristine sky, while in Tsim Sha Tsui this number staggeringly rises to about 1200, ranking the worst on the planet. This serious situation arouses considerable impacts on human health and the astronomy together with the disturbance to the ecology.
Small amounts of ozone develop naturally, especially during lightning storms, but spew industrial chemicals and automobile exhausts into the atmosphere, cook them with heat and sunlight, and ozone levels can rise dangerously high. Ozone is the main component of “photochemical smog”. Oxygen, a gas that we inhale with every breath, is essential to life on Earth. But as a chemical, oxygen is reactive. That property makes it life-sustaining and also a source of pollution.