Plants and animals carry out respiration to release energy.
Give the balanced chemical symbol equation for aerobic respiration.
The table below shows estimated global carbon dioxide (CO2\text{CO}_2CO2) emissions from fossil fuel combustion between 2000 and 2020.
| Year | Mass of CO2\text{CO}_2CO2 released (millions of tonnes) |
|---|---|
| 2000 | 25000 |
| 2005 | 28000 |
| 2010 | 31000 |
| 2015 | 34000 |
| 2020 | 36000 |
Calculate the percentage increase in the mass of CO2\text{CO}_2CO2 released globally between 2000 and 2020.
Give three negative environmental effects of increased levels of carbon dioxide in the atmosphere.
Explain how reducing deforestation 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.