A team of scientists studied the total mass of carbon dioxide released when animals and plants are reared on farms and then eaten by humans as food.
(a)[3]
Suggest and explain how human actions can cause carbon dioxide to be released after food has left the farm where it was produced.
(b(i))[3]
A farmer chooses to switch production from lamb to beans. Calculate the percentage change in carbon dioxide released per kg of food produced.
(b(ii))[4]
Use the table results together with your scientific knowledge to explain how this diet choice could benefit the environment.
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