The gaseous component present in the troposphere is ...... .

What is the correct sequence of atmospheric layers starting from the Earth's surface?

$BOD$ values (in $ppm$) for clean water $(A)$ and polluted water $(B)$ are expected respectively:

Which of the following statements is true about the ozone layer?

State whether the following statements are true or false:
$(1)$ Mist is produced by particles of spread liquid and by condensation of vapour in air.
$(2)$ Particulate matter of size up to $5 \ \mu m$ reaches directly into the lungs.
$(3)$ Ozone and nitric oxide cause irritation in the nose and throat.

How is non-degradable industrial solid waste disposed of?