Pollution load in the atmosphere from non-renewable sources – Coal and Petroleum
Non-renewable resources coal and petroleum are energy sources that we use and consume faster than the rate of their production in nature.
fossil fuels
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Applications, Potential and Limitations of solar energy
There are various uses of Solar Energy. Farmers in Traditional Farming Communities used to solarise fields by living them empty after a deep ploughing during summers. It killed insects and pests. Human skin synthesizes vitamin-D when exposed to sunlight for short durations. Mothers used to make their babies sleep in the sun after oiling their bodies during winters in order to keep them healthy and strong.
Medicinal Weed Argemone Mexicana or Satyanasi
Medicinal weed Argemone Mexicana or Satyanasi is a prickly weed. It has been introduced and naturalized in India. It grows as waste land weed in almost every part of the country. It is reported as crop weed also in many parts of the country.
Bioinvasion of Foreign and Genetically Engineered Species
An incident of invasion by a living species into entirely new habitat thereby threatening the existence of native species is called as bioinvasion or Biological Invasion.
What is acid deposition? What is acid rain?
The acid rain affects living and non- living components of environment. In July 1982, Stockholm- the venue of U N –conference on acid rain, suffered heavy acid showers for about a week. In India too, acid rains have been reported since last twenty years in areas where thermal power plants are located and also around Delhi, the capital of India.
Mahua and Its Importance
Mahaua or the Madhuca longifolia is indigenous to India. It is a good sized tree and it grows up to 20 meters in height.
Modes of Reproduction
Two organisms- male and female are essential for sexual reproduction. Now let us study some basic methods of reproduction in single organisms.
Technology and technological activities
The application of scientific knowledge for practical purposes, especially in industry, is called as technology.
Cooking and Fuels
The process of preparing food for consumption with the use of heat is called as cooking. The art and science of cooking is called as cookery.
Processes of Life
All those processes that maintain the body of an organism collectively are called as life processes. These processes principally include Nutrition, Respiration, Internal Transport, and Excretion. Some other processes of life like control and coordination, Reproduction, Heredity and Evolution etc. are essentially found in living beings but they are not directly related to processes of life. Hence, these may or may not be regarded as life processes
Pollution- disruption of nutrient cycles and habitats
Our natural resources are known to have some specific qualities of their own. These qualities are known as natural qualities. It is due to specific natural qualities that different natural resources have been useful to us and to the whole biosphere. But now, the condition has changed considerably. Most of our natural resources like air, water and soil have gone bad due to pollution of different types. What is pollution?
Dynamics of Population
A population is a group of individuals (all members of a single species) who live together in the same habitat and are likely to interbreed. Each population has a unique physical distribution in time and space. It may contain individuals of different ages, and its size (density) is likely to change over time. It grows or shrinks according to the reproductive success of its members.
