Have you heard? Forty percent (40%!!) of food in America gets thrown away. Much of that food is tossed before it ever reaches consumers.
My favorite way to prevent food waste: shop at the farmers market.
One of the very big down sides of industrial agriculture is homogenization. This applies not just to the sharp decline in the number and diversity of varieties grown, but also to the accepted size and appearance of fruits and vegetables. Too large, too small, not spherical or cylindrical enough, slightly blemished. I read once that when citrus is harvested the fruit has to fit within narrow size and shape parameters so that the same quantity will fit perfectly together within each box. Those that don't fit correctly are tossed to the side, possibly recovered, possibly not. Many perfectly edible, nutritious, and delicious fruits and vegetables never even make it to stores because they don't fit the aesthetic or utilitarian standard.