Tar spot distribution map

Where are tar spots most common? What might this suggest about air quality?

This map shows the average number of tar spots for each survey submitted. Scientists think that tar spot fungus does less well where pollution levels are high. However, much more research is needed to confirm this - which is why your results are so important to us.

Can you see any patterns taking shape on the map? Do you think this can be explained by air pollution?

No tar spots

1 to 20 tar spots on average

More than 20 tar spots on average