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An ecological system is a:
Which one of the following practices is adopted for restoring the fertility of soil?
Best way to conserve our water resources:
How many types of ecological pyramids are present in ecosystem?
Sink hole is a phenomenon of:
Which of the following does not belong to physical environment?
A landscape which is caused due to the fissure in the earth along which one side has moved down with reference to the other is known as:
Which of the following is the newest geological era?
The largest forest which covers 25 percent of the world’s forest land is:
There is a need to keep larger area under forests for: