Geography

Sex ratio is used to describe the number of females per 1000 of males. Sex ratio is a valuable source for finding the population of women in India and what is the ratio of women to that of men in India. In the Population Census of 2011 it was revealed that the population ratio in … Read more

Gondwana coal makes up to 98 per cent of the total reserves and 99 per cent of the production of coal in India. Satpuras, denudation [weathering + erosion] has exposed coal bearing Gondwana strata.The carbon content in Gondwana coal [250 million years old] is less compared to the  Carboniferous coal [350 million years old][Almost Absent in India] because of its much … Read more

District Mineral Foundation (DMF) is a trust set up as a non-profit body, in those districts affected by the mining works, to work for the interest and benefit of persons and areas affected by mining related operations. It is funded through the contributions from the holder of major or minor mineral concession in the district … Read more

When corals are stressed by changes in conditions such as temperature, light, or nutrients, they expel the symbiotic algae living in their tissues, causing them to turn completely white. Warmer water temperatures can result in coral bleaching. When water is too warm, corals will expel the algae (zooxanthellae) living in their tissues causing the coral to turn completely … Read more

Variations of temperature, pressure and density are much larger in vertical directions than in horizontal. This strong vertical variations result in the atmosphere being stratified in layers that have small horizontal variability compare to the variations in the vertical. The atmosphere can be divided into five layers according to the diversity of temperature and density. … Read more

A large section of Indian population lives in villages and is mainly engaged in agriculture. They belong to weaker section of the society. There is a definite trend of rural population migrating to the urban areas due to lack of employment opportunities, low earnings, insufficient means of transport and insanitary living conditions. The latter is … Read more

Continental shield, any of the large stable areas of low relief in the Earth’s crust that are composed of Precambrian crystalline rocks. The age of these rocks is in all cases greater than 540 million years, and radiometric age dating has revealed some that are as old as 2 to 3 billion years.Shield areas in general are … Read more

They can be of various types depending upon the process of precipitation,  obstacles etc. Convectional Rain The, air on being heated, becomes light and rises up in convection  currents. As it rises, it expands and loses heat and consequently, condensation takes  place and cumulous clouds are formed. With thunder and lightening, heavy rainfall  takes place … Read more

China China ranks first in the world in coal production. Nearly 38 per cent of world’s coal output is from China. All types of coal are found, including anthracite, bituminous coal and lignite. Although coal occurs in every province of China, but its greatest concentration is in Shanxi and Shaanxi (Shansi and Shensi).   USA … Read more

. India is a tropical country and has around 300 days availability of sunlight which is one of the highest in the world. Germany is a sub-tropical country, now produces almost 40% of its energy from renewable power. India has huge potential.  Solar power has one unique advantage that it can be used to supply … Read more