A food-processing site produces 1000 tonnes of waste each year. Two proposals for dealing with the waste are being considered.
Proposal A needs land for a new recycling plant and a small landfill site. Proposal B needs land for a landfill site only.
The table gives information about each proposal. The number of species was recorded in the habitat that would be cleared for each proposal.
| Proposal | Mass of waste recycled in tonnes | Mass of food waste sent to landfill in tonnes | Mass of other waste sent to landfill in tonnes | Area of habitat cleared in hectares | Number of species recorded in the habitat |
|---|---|---|---|---|---|
| A | 680 | 120 | 200 | 0.9 | 16 |
| B | 570 | 230 | 200 | 0.2 | 3 |
Calculate the percentage reduction in the mass of food waste sent to landfill if Proposal A is used instead of Proposal B.
Use the information in the table to suggest which proposal should be chosen to maintain biodiversity. Justify your answer.
Give one reason why Proposal A could contribute less to global warming than Proposal B.
84 exam-style questions on AQA GCSE Biology 7.3 Biodiversity and the effect of human interaction on ecosystems, covering 7.3.1 Biodiversity, 7.3.2 Waste management, 7.3.3 Land use, 7.3.4 Deforestation, 7.3.5 Global warming, and 7.3.6 Maintaining biodiversity. Each one has a worked solution and a mark scheme showing where the marks go.