Some scientists believe that agricultural practices are a key factor in global climate change due to the release of greenhouse gases like methane (CH4\text{CH}_4CH4).
The graph below shows the relative methane emissions from the agricultural sector in the European Union (EU) and the relative change in global ocean heat content between the years 1990 and 2020.
Evaluate the information shown in the graph. To what extent does the graph support a link between agricultural methane emissions in the EU and global ocean warming?
Suggest two problems with using information about EU agricultural methane emissions to draw conclusions about global ocean heat content changes.
Describe one effect of global warming on the marine environment, other than rising water temperatures.
Suggest one way human activity can be modified to reduce methane emissions from agriculture.