Vegetables and fruits supply some of the protein, carbohydrates and lipids required in a balanced diet. Name three other parts of a balanced diet that can be obtained from vegetables and fruits.
State two reasons why plant oils and other lipids matter in the human diet.
Use Table 2.1 to calculate the percentage contribution made by plant protein sources to the recommended average daily protein intake for humans.
The worldwide average daily human intake of red meat is approximately 300% of the recommended amount. Calculate how much red meat an average human eats in a year (365 days). Give your answer in kilograms.
It is more energy efficient for humans to eat plants. Explain the reason for this.
If humans cut the amount of animal protein they eat, less agricultural land will be needed. Suggest three environmental benefits of reducing the land used for agriculture.