Which of the following is the source of air pollution ?
‘There was no oxygen in our atmosphere earlier and it was added to the atmosphere later on’ the above statement is
Cyanobacteria or blue-green algae became the first microbes to produce oxygen by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years age.
Name the process through which oxygen was added to the atmosphere
‘Hug the trees movement’ was the result of grass root level effort to
Find the incorrect statement
Nandan kanan Biological reserve is situated in
Which of the following is non biodegradable
Which product is formed when CO combines with haemoglobin ?
Expand D D T
Dichlorodiphenyltrichloroethane, commonly known as DDT, is a colorless, tasteless, and almost odorless crystalline chemical compound.
Which of the following is point source of water pollution ?
Floods can be prevented by-
Filariasis is a disease spread by
How many national parks are there in India ?
What does Reuse in three R’s refer to ?
Reuse means using a product more than once, either for the same purpose (for example returnable glass milk bottles) or for a different purpose (such as old jam jars for food storage). Repairing products, selling them on or donating them to charity/community groups is also reusing!
It is preferable to recycling because the item does not need to be re-processed before it can be used again which saves both money and reduces the environmental impact.
Amrita Devi Bishnoi sacrificed her life for the protection of
Statement A : Tendu leaves are used to make Bidis
Statement B : AK Banerjee was involved in the protection of Khejri trees
The Tendu leaves are obtained from Tendu tree (Diospyros melanoxylonRoxb.) The wide-scale use of Tendu leaves in Bidi industry is mainly based on their enormous production, agreeable flavour, flexibility, resistance to decay and capacity to retain fires. The broad morphological characters on which leaves, are selected and catagorised for Bidi making are size, thickness of leaves, texture, relative thickness of midrib and lateral veins.
Kuhls, a local system of canal irrigation was evolved in
Which of the following problems is not associated with construction of sardar sarovar dam on the river Narmada.
Euro I and Euro II are norms for
‘Chipko Andolan’ originated in a remote village called Reni in Garhwal in the Himalayas during the
Select the eco-friendly activity-
wind turbines produce no air, water, or thermal pollutants, and emit no greenhouse gases.
Coliform is a group of bacteria’s found in
Which of the following is called as “Biodiversity hot spots”
Statement A : Nomadic shepherds drove their flock up from the valleys during the month of winter
Statement B : A K Banerjee was involved in the protection of sal forest
Which of the following is water harvesting structures in Kerala