Fig. 9.1 illustrates the way the mean global atmospheric carbon dioxide concentration has changed during the 800000 ($800 \times 10^3$) years before 2020.
(a(i))[2]
Calculate the percentage increase in carbon dioxide concentration from point A to 2020. Show your working. Give your answer to one decimal place.
(a(ii))[4]
Suggest how the changes in carbon dioxide concentration from A to 2020 may have influenced the environment and biodiversity.
(b)[4]
Outline the reasons for preserving plant biodiversity.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$36.7\%$ (derived from $\frac{738-540}{540} \times 100$)” …