Not only did we have a gas stove that was probably spiking NO2 levels when we actually used it; we also seemed to have a gas leak. It was not a big one, just a faint smell, but it was hard to pin down. A plumber concluded the connection between the range and the pipe wasn't the problem. No specific part of the range smelled stronger than the rest of it. For all we knew, it might be a hole in a pipe. So we wanted to make gas stop flowing through our unit (a condo within a three-family home, very normal here in Cambridge, Massachusetts) altogether.
We contacted an appliance company about switching to induction. To prepare, they told us, we would first need to upgrade the range power outlet to 40 amps, and cap off the gas pipe behind the range.
The electrical work cost $1800. It could have been much more; we were lucky our circuit breaker was positioned such that they only needed to make two openings in our walls. (They suggested we put little hatch doors in those spots to make future work easier.)
We asked our plumber to not only cap off the gas pipe behind the range, but also put in a valve in the basement, such that gas flow could be shut off to our unit, but also easily turned back on if a future owner wants to reverse what we did. We did this rather than turn off our gas altogether, because we have a gas water heater and still needed gas available there. The plumbing work cost about $300 I think.
To make cooking stay as close as possible to being how great and fast it is with gas, we chose a range with an induction stove: The LG LSE4616ST, which cost $3000.
We were lucky to be able to afford this change for our health. Of course, it would have cost a lot less if we hadn't cared about induction, but still multiple thousands of dollars.
We should be subsidizing conversions like this.