The Table shows the world human population and the mass of meat produced in the world in three different years.
Table
| Year | World population in billions | Mass of meat produced in millions of tonnes |
|---|---|---|
| 1980 | 4.4 | 137 |
| 2000 | 6.1 | 232 |
| 2020 | 7.8 | 337 |
State what is meant by food security.
Calculate the percentage increase in the world population between 1980 and 2020.
Give your answer to one decimal place.
Explain why an increase in the amount of meat that people eat can reduce food security.
Give two other biological factors that can reduce 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.