Ecologists and climatologists are highly concerned by shifts in the concentrations of atmospheric greenhouse gases, which trap heat and impact global biodiversity.
Figure 1 shows the concentration of atmospheric carbon dioxide (CO2\text{CO}_2CO2) measured in parts per million (ppm) between 1960 and 2025.
a.[4]
Describe two patterns shown in Figure 1. Use data from Figure 1 in your answer.
b.[2]
Give two human activities that increase the concentration of carbon dioxide in the atmosphere.
c.[4]
The trend shown in Figure 1 may continue for many years. Explain what effect the rising concentration of greenhouse gases like carbon dioxide could have on living organisms.