Question

In higher pressure environments, less gas can be dissolved in a solvent. True or False?

Answer 1

Nope.  Just the opposite.

That's why, when you open a new bottle of soda and
let the pressure inside come down to atmospheric
pressure, some of the sparkly gas comes out of solution
and goes "hisss" out of the bottle.  (If you open the bottle
too fast, then some of the soda comes out with the gas.)

Answer 2

This is a true statement.