World Meteorological Organization (WMO). This Bureau operates a network of ozone monitoring stations, where the total amount of ozone above the station (the total column ozone) is monitored each day. The total column ozone is measured with an instrument called a Dobson spectrophotometer, compares the amount of sunlight at twoContinue Reading
Ozone is the major absorber of UVB (Ultraviolet radiation in the wavelength range 280-320 nanometres) in sunlight, absorbing approximately 90% of it. Many experimental studies of plants and animals, and clinical studies of humans have shown the harmful effect of excessive exposure to UVB radiation.Continue Reading
About 90% of ozone is concentrated between 15 and 30 kilometres above the earth’s surface (stratospheric ozone). It is also found at ground level in lower concentrations where it is a key component of smog over major cities (tropospheric ozone).Continue Reading
Ozone is one of the several gases that make up the earth’s atmosphere. It is the triatomic form of oxygen and makes up approximately one part in three million of all of the gases in the atmosphere. If all the ozone contained in the atmosphere from the ground level upContinue Reading
Black hole According to the general theory of relativity, a black hole is a region of space from which nothing, including light, can escape. It is the result of the deformation of spacetime caused by a very compact mass. Around a black hole there is an undetectable surface which marksContinue Reading
An asteroid is like a planet, but smaller. The name “asteroid” means “like a star” in the ancient Greek language. Asteroids may look like small stars in the sky, but they really do move around the Sun, while stars only seem to move because the Earth spins. Like planets, asteroidsContinue Reading
A nebula is usually made up of hydrogen gas and plasma. It is the first stage of a star’s cycle. There are four different types of nebula. These are; Emission, Reflection, Dark, and Planetary. Opinions on the number of Nebulae do vary, however, and some of these other types includeContinue Reading
Country EPI Score 1. Switzerland 95.5 2. =Norway 83.1 = Sweden 83.1 3. Finland 91.4 4. Costa Rica 90.5 6. Austria Continue Reading
Surname Name Bengal’s Sorrow Damodar River Blue Mountains Nilgiri Hills City of Sky-scrapers New York City of Seven Hills Rome City of Dreaming Spires Oxford City of palaces Kolkata City of Golden Gate San Francisco City of Magnificent Buildings Washington D.C. City of Eternal Springs Quito(S.America) China’s Sorrow Hwang HoContinue Reading
Limnology is the study of waters that are not part of the oceans or seas. These are rivers, lakes, swamps, water under the ground, and even bodies of water made by people. Scientists who do this are called limnologists. Their work includes biology, chemistry, geology, and hydrology. Limnology is theContinue Reading
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