Question

When humans are at higher altitudes, how is their exposure to radiation effected?

Answer 1

The radiation increments a lot

Explanation:

For example, one commercial plane that travel up to 40000 feet high receives at about 3 microsieverts an hour, comparing with an astronaut of the iss, that receives 80000 microsieverts in six months, but the people with highest radiation exposure are the smokers, cause the radioactive isotopes of lead, check this video of veritasium.