Beef is a renewable resource.

Yes, cows will literally reproduce and make more cows.

You're on the right track but the health problems in USA aren't caused by a lack of beef or lack of animal protein, it's the chemical poisons(petroleum based colourings and flavourings and fake vitamins)they mix into everything and the excessive consumption of corn syrup and seed oils.

Americans have a diet that's extremely high in energy but low in nutrients and fibre.