The Chipko Andolan was started in Khejrali village near Jodhpur in Rajasthan.

The $pH$ of a water sample collected from a river was found to be acidic in the range of $3.5 - 4.5$. On the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the $pH$ of river water?

State one reason for the conservation of forest and wildlife.

In the year $1731$,where did the incident of sacrifice by Amrita Devi and other individuals take place?

Select the eco-friendly activity among the following.

Which of the following options is $NOT$ included in recycling for environmental conservation?