changes in supply and demand

The main aim of this type of forestry is to supply goods and services to meet the local demand for firewood, fodder, food, fertilizers, fibre, timber, medicines etc. It is classified into two types: Social Forestry and Environmental Forestry: Trees which are useful to the triba..

Along with warmer temperatures and higher humidity, the number of very hot days is expected to rise in many areas around the globe. Heat stress occurs in such conditions and the young, old and poor people are more susceptible to it. High temperatures will reduce work efficiency of human beings. Fu..

Experiment 1 - Take a few pieces of ice in a beaker. Insert a thermometer. Note the temperature. You will observe it to be 0 0 C. Now place the beaker on a flame and heat it. Ice starts melting. As you supply heat to ice, its temperature should rise. But you will find that the temperature..

Green manure refers to supplying the plant nutrients by application of living plant material to the soil. The nutrients are made available after decomposition of green manure in soil. Many plants have been identified for their potentiality as green manure. The green manures are normally ..

Organic Food - With world wide awareness about dangers of persisting pesticides in food crops, enormous interest is shown in food grown on organic farming principles. Such food is called organic food . Organic farming is a method of farming wherein synthetic chemical is not used in any form - eithe..

Environmental Ethics - Ethics is a discipline concerned with moral obligations, with emphesis on right and wrong. Our obligation towards the environment and other species is environmental ethics. We are right now over exercising our right and failing in our duty towards the environment. We have a r..

Generators are devices that produce electricity by converting mechanical energy into electrical energy. It works on the principle of 'electromagnetic induction' [Electromagnetic Induction is the creation of a voltage or current due to change in magnetic field]. Most of the electricit..

The signs of 'w' and 'q' are related to the internal energy change. When 'w' or 'q' is positive, it means that energy has been supplied to the system as work or as heat. The internal energy of the system in such a case increases. On the other hand, if 'w' or 'q' is negative, it..

When a liquid is heated, the heat supplied is consumed to pull the liquid molecules apart against strong attractive forces, which hold them together in the liquid form. The heat energy goes to compensate the loss of energy due to escaping molecules, which have to overcome the attractive ..

Interrelationship of Population, Environment and Development - As mentioned earlier man's intervention is causing drastic changes in the environmental systems of earth and disturbing its ecological balance. This disturbance gets compounded with the problem of population explosion in the w..