Plants and algae absorb greenhouse gases from the atmosphere to produce organic molecules.
Give the balanced chemical symbol equation for photosynthesis.
The table below shows estimated global carbon dioxide (CO2\text{CO}_2CO2) emissions specifically from commercial aviation between 1990 and 2018.
| Year | Mass of CO2\text{CO}_2CO2 released (millions of tonnes) |
|---|---|
| 1990 | 540 |
| 2000 | 690 |
| 2010 | 780 |
| 2018 | 918 |
Calculate the percentage increase in the mass of CO2\text{CO}_2CO2 released globally from commercial aviation between 1990 and 2018.
Give three negative environmental effects of global warming resulting from increased levels of greenhouse gases in the atmosphere.
Explain how protecting and restoring peat bogs can help limit the increase of atmospheric carbon dioxide.
44 exam-style questions on Edexcel IGCSE Biology Human influences on the environment. Each one has a worked solution and a mark scheme showing where the marks go.