What can a bottle purchased for pickles be used for?

Which are the three $'R'$s to save the environment?

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?

Write two methods of waste disposal.

"What was the Chipko Andolan?" How did this Andolan ultimately benefit the local people and the environment?

The three $R's$ that will help us to conserve natural resources for long-term use are