I also see a lot of people taking pickle, onion rings, cucumber pieces, tomato slices, and chutney that is at the start of the buffet and then leaving it untouched on their plate. Lemon wedges also go waste needlessly.
Another thing that is wasted is drinking water. Never take a glass of water or a bottle and leave it half-finished whether in a restaurant, at home, or at a function. It will just get thrown away. We all know that our planet's water resources are drying up and have seen for ourselves within our own country dry river beds and drought situations that destroy a farmer's crops. It is such a criminal waste of such an important element that sustains both human and animal lives.
Now there are some people who are trying to collect waste food from functions and that is being distributed to people who are having no food. I have seen some posts on Social Media mentioning the phone numbers to which we can make a call.
Buffet dinner or lunch is actually good to control wastage, if the people are sensible enough. The plate is in their hands, They know how much they can eat and what are their preferences. Even then people fill their plates and leave food on the plate. All people should think about this and should avoid wasting food.
During my brother's daughter's marriage, the number of guests expected was more and actual attendance was less. So food sufficient for 50 people was left over. Then we handed over that food to an orphanage near by and the same was served to the kids as dinner.
There was a famous Tamil writer names Mr. Manian (also called as Idhayam Pesukiradhu Manian) who travelled almost all parts of the world and wrote a good books on his travelling experience but we can see some where about food in all his books. One day I happened to meet him in our advocate office. I told him that the experience about food in travelling places is different as I have also got similar in many places.
One time When I visited Chandigarh, I got meals in a hotel. When I asked the waiter for curd after reserved some cooked plain rice for mixing with curd, I got reply that no curd was there to supply. Disappointed myself with some Idea I asked khatta lassi. I got it for an additional cost and ate by added that in the rice.