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.
When it comes to diet, many health-conscious consumers have come to the conclusion that protein is king. Specifically: chicken. Diet trends, such as the recently debunked Paleo diet, have overstated the importance of eating a lot of meat. At the same time, consumers have been put off red meat by its associated health and environmental concerns. This has led to consumers increasingly eating more chicken instead.