I was feeling hungry about dinner time a while back, but I couldn't decide what to eat so I skipped. I woke the next morning and didn't feel hungry at all. That seemed odd to me. So I skipped breakfast and ate lunch only (same portion size as normal) and continued to do so for six weeks. I felt great. Workouts strong, focus and concentration improved. I saved a bunch of time and money.
After that did a 13 day fast (zero food). Day 3 sucked, but the 10 that followed where really eye opening in a wholly positive way. I do a lot of boxing, and I didn't stop during this fast. I thought it would suck but I had tons of energy and lots of speed. At the finishing lime, the first morsel of food (some roast pumpkin) was savored and tasted incredible. It gave me a new awareness and appreciation of what and how much food I need to maintain maximum performance.
I know i could eat a LOT less than I do in a year and be as or more healthy and contribute to a healthier environment. We just have to break the habit. That's really hard given the social culture of eating.