If you don't have a car and rarely eat red meat, you are doing GREAT ๐๐ ๐
Sure, you can drink tap water instead of plastic water. You can switch to Tea. You can travel by train. You can use Linux instead of Windows AI's crap. Those are great ideas. But, don't drive yourself crazy. If you are only an ordinary citizen, remember that perfect is the enemy of good.
You are right of course, but โper kg productโ is not a fair comparison when it comes to how the population is fed. Cheese (3000-4000kcal/kg) vs. milk (500. kcal/kg) is the best example for that.
Meat alternatives are often scored on how environment friendly they are per gram of protein, same with milk alternatives. Though i suppose better per kg of product, you'd still miss important data if you'd only consider proteins.