Question

why do we often sneeze when we inhale a lot of dust Laden air​

Answer 1

When we inhale a lot of dust laden air we sneeze because our nostrils can't tolerate and irritate by the small dust particles.

Answer 2

Sneezing expels the foreign particles from the inhaled air, so that only clean air enters our body. ... Smoke, dust, pollen, etc. are some of the unwanted particles that may causesneezing.