Tag: science & technology

People all over the world have thought of innovative ideas for use of waste. One man in India, Nek Chand, has developed an exquisite artwork from garbage, a rock garden in this city.

What % of earth is covered by water and what % of it is readily available for human consumption?

Which is the first state to implement the path-breaking proposal that environment should be included as a separate subject in schools?

Materials of biological origin which are commonly used to maintain and improve soil fertility are:

CFCs (chloro-fluoro-carbons) are greenhouse gases that have caused a rise of 0.3 ºC in the global temperatures in the past century. Name the CFC that is used in refrigerators

Solar cells are simple photovoltaic devices that convert solar energy directly into electricity and are manufactured from the second-most abundant element in the earth’s crust. Name it.

Name the gas released from landfills, decaying organic matter under shallow water in marshes, flooded paddy fields, by ruminant animals & termites, and by the burning of biomass. A molecule of this gas has 21 times more global warming potential than a molecule of CO2.

Following is the most widely discussed impact of climate change:

About 74% of the sun's mass is:

The sun is a: