Chest freezers were often kept in garages and other cold places and worked efficiently (and economically) by not having to fight central heating temperatures. I have read your column for years, and been impressed with the clear explanations you normally provide.
Amino acids are found in animal sources such as meats, milk, fish, and eggs. They are also found in plant sources such as soy, beans, legumes, nut butters, and some grains (such as wheat germ and quinoa). You do not need to eat animal products to get all the protein you need in your diet.
This term is sometimes used for people who don't swear off eating meat altogether, but they do avoid certain types of animal products. For example, they might only eat white meat like poultry, seafood or fish, while avoiding beef, pork and other red meats.