It is more energetically efficient for us to to eat more

It is more energetically efficient for us to to eat more plant based foods. Vegetarianism is more energy efficient than eating meat .Less of the energy the plants contain is wasted and this is why eating plants is more efficient. In contrast to this if you eat animal foods, most of the energy in the plants those animals ate has been lost as heat and only a fraction of it reaches you.  

Ithink it is b  employees