Which trees are used as sources of timber?

Among the statements given below,select the ones that correctly describe the concept of sustainable development:
$(i)$ Planned growth with minimum damage to the environment
$(ii)$ Growth irrespective of the extent of damage caused to the environment
$(iii)$ Stopping all developmental work to conserve the environment
$(iv)$ Growth that is acceptable to all the stakeholders

How does mining disturb ecological balance? Explain.

What are the various factors which are damaging our forests?

Enlist four simple choices which can make a difference in our energy consumption patterns.

The $Dharoi$ dam is built on which river?