Bugs are not really problem if they have amble places to live and gather nutrition and so on.
We have a wild garden, and people often ask if there are not bugs everywhere, and tell us they like grass to keep the bugs away. Well quite contrary - our findings are, that in our wild garden, bugs are around the plants, in the plants, but they are not are problem in the spaces we have created for ourself at all. I think people have misunderstood why insect swarm.
I'd actually have to imagine the bug count wouldn't be that much worse than a typical city, replete with flies and mosquitoes from the abundance of humans and human food waste to feed on.
If anything the bug problem might be slightly improved since the ecology would be friendlier to things that eat bugs, such as frogs, lizards, and bats.
Of course, then you've got the problem of frogs and lizards getting into your house. And, ultimately, things that like to eat frogs and lizards, like snakes.
If you're swallowing bugs while cycling that means you're probably mouth breathing. It's pretty challenging to convert to strict nasal breathing, but it's worth it and a side benefit is bugs aren't a big deal if you're wearing something on your eyes.
In case people thought mouthbreather is just an insult, it can cause serious medical problems and even change the structure of your face. There are videos about it on the internet, with dramatic before and after photos (in both directions).
I cycle at the higher end of my aerobic threshold to get around and my bike is single speed so I have to go anaerobic on hills. Do you cycle at a more leisurely pace or do you maintain constant nose breathing even during strenuous exercise? If the latter, I would probably caution you of the health effects of that too.
I'm definitely curious if you have references to negative health effects of nasal breathing. I've seen quite a bit on the positives, even with strenuous exercise. I maintain nasal breathing when riding fast, during kettlebell workouts, and sandbag workouts.
Or it may just mean he is cycling fast. It is only when cycling st a relatively comfortable pace that you can get enough oxygen through only your nose.