Burning Plastic Smell from Hospital

Hi All, I stay in a rented place nearby a hospital in Trivandrum . Often I had sensed burning Plastic smell near the place. It's not direct visible smoke, but a lingering smell in the air. I had brushed it off multiple times as some neighbour burning Plastic - what to do as I can't see smoke. But since past few days this smell comes everyday at night - post 10 PM. Last day I got a bit suspicious and searched nearby for smokes. After smelling around the house I found it is coming from the backside of a nearby hospital. So this hospital is nearby my home (~10 meter). After a bit of initial search online, I found certain plastic waste can be burned at hospital. (mask gown etc). I don't know the technical design, but I'm pretty sure they should have chemical scrubbers or atleast filters. Few questions 1. Are these kinda smell normal. To anyone staying or working near hospital. Have you felt burning Plastic Smell. 2. Have anyone complained against such big institutions? I am wondering about possible blowback. 3. I found two ways of complaint - one is smart trivandrum app and other the lsgd send plastic burning Pic. Which would be better way to complain? 4. Will talking to the hospital reception work?