Is HSO4 polar or no polar

It is polar

Explanation:

Hydrogensulfate is an oxoanion of sulphur , conjugate base of a sulfuric acid and conjugate acid of a sulfate

Please see the structure of HSO4 in the attached image

Polar molecules have  electronegativity difference between the bonded atoms.

In case of Hydrogensulfate, hydrogen is positive while sulfate is negative ion.

Electronegativity of hydrogen is 2.2 while that of sulfur and oxygen is 2.58 and 3.44 respectively

Thus, it is a polar molecule.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.