I'm curious about the correlation though - some forms of cooking, e.g. deep frying, are extremely difficult with an electric stove and create way more particula

I'm curious about the correlation though - some forms of cooking, e.g. deep frying, are extremely difficult with an electric stove and create way more particulate matter / fumes than the burning gas itself. Heck even cooking itself is a lot easier with a gas cooktop, so you're likely to cook more instead of using the microwave, resulting in more smoke.