Which gas is released into the atmosphere by the exhaust of supersonic jet planes?

Which among the following statements is $NOT$ true according to principles of green chemistry?

What concentration of carboxyhaemoglobin complex in the human body reduces the oxygen-carrying capacity of haemoglobin?

Green chemistry means such reactions which

The concentration of dissolved oxygen in water for the growth of fish should be more than $X \ ppm$ and the Biochemical Oxygen Demand $(BOD)$ in clean water should be less than $Y \ ppm$. $X$ and $Y$ in $ppm$ are,respectively:

Give the name of particulate pollutants with examples.