It's a great question but very hard to generalize because each plant and animal in the food system has its own story. We would need to research and judge individually. It should be fun and not stressful! Maybe try one new thing per week.
Originally Posted by Primaholic
Generally I'm okay with conventional plants. Even organic produce has pesticides that should be rinsed, though I'm not sure pesticide impacts us much anyway. Transportation is a tiny fraction of the overall production cost so it's better to let plants grow where they grow efficiently. Weekly sales are often a decent proxy for seasonality.
With animals I'm more picky. The color and flavor of eggs, organs, and dairy is quite different between legit local farms and whatever gets sold at gas stations. For meat and fish I try to learn the names of individual providers--it might take a little digging to find one that's affordable and consistent but I only need one. To compensate I'm not eating tender grilled steak and wild salmon every day but the less popular cuts can be just as satisfying with proper planning. In fact, sometimes the top quality shanks/tails/necks/wings are a steal--the rich folks don't want them and the CAFO equivalent isn't even displayed.
Lots of: urban hiking, cycling, sprinting
Lots of: fresh meat, seafood, eggs, organs, tubers, starch fruits, vegetables, meat fat, dairy fat, oil fruits
Some: cured meat, dairy protein, sweet fruits, rice, pulses, tree nuts, oil seeds
Minimal: soy, refined proteins, sugar, liquid carbohydrate, grains, refined oils, peanuts