I kind of work in that field, i do a lot of indoor air quality testing...there is a lot of field work, which is a lot of driving around - ie i can't commute in by bike. I work for a private firm.

it can get pretty repetitive, and sometimes boring, because there is fair bit of waiting for the equipment (to do their thing)...

I appreciate more "the big picture" aspect of my job - that by doing what i am doing i am helping the indoor environment be better...

I have an MSc in env sci that focused on geochemistry.