One hectare of land can be used to grow soya beans for humans to eat, or to grow soya beans to feed chickens.
The soya beans grown on one hectare contain 20 000 MJ20\,000\ \text{MJ}20000 MJ of energy.
Chickens fed on the soya beans from one hectare produce meat that contains 1800 MJ1800\ \text{MJ}1800 MJ of energy.
The world human population is increasing.
Use this information and your own knowledge to explain why eating less meat and more plant crops could improve global food security.
38 exam-style questions on Edexcel GCSE Biology 9.2 Energy transfer and biodiversity, covering 9.2.1 Energy transfer between trophic levels, 9.2.2 Efficiency of energy transfers, 9.2.3 Human interactions and biodiversity, 9.2.4 Benefits of maintaining biodiversity, and 9.2.5 Biological factors affecting food security. Each one has a worked solution and a mark scheme showing where the marks go.