Yes.
Cars used to have vented gas caps, so when the gas tank got hot, the radiant heat from the hot parking lot for example, the gas tank would build up pressure and the pressure would vent through the cap.
Then the found out that all those gas vapors are bad for the enviroment, so theyy stopped using vented gas caps. You know, green house gases and all.
So they came up with the carbon canister. A canister full of charcoal under the hood with a line from the gas tank running to it, the vapors collected in the canister and returned to liquid. When the canister was full you replaced it.
Then they took it one step further, return the gas back to the gas tank. Granted it is very small amounts of gas, unless you live in someplace hot.
If ever you remove your gas cap and it hiss's at you then there is a problem with your evaporation system and it needs to be looked at.