Which of the following statements is incorrect?

For which major rivers in India has the Ministry of Environment formulated an action plan?

$A$ : Montreal Protocol suggested the reduction of $ODS$.
$R$ : $A$ landmark international agreement taken in Earth summit held at Rio de Janeiro.

Polyblend is mixed with $\underline {i}$ and is used to lay $\underline {ii}$.

What is the year associated with the Chipko movement?

Read the following statements carefully and select the correct ones.
$I.$ $UV$ rays are essential for the production as well as degradation of ozone gas.
$II.$ Ozone present in the ionosphere acts as a shield absorbing $UV$ radiation coming from the sun.
$III.$ One-fourth of the incoming solar radiation is reflected by the atmospheric gases and clouds,and only half of the incoming solar radiation falls on the earth's surface,heating it. Of this,only a small portion is reflected back.