Final answer:
The best way to show the problems pollution in the Thames has caused is through visual presentations, photographs, videos, and data, as well as organizing field trips or visits to observe the pollution firsthand.
Step-by-step explanation:
The best way to show people the type of problems pollution in the Thames has caused over the years would be to conduct a visual presentation using photographs, videos, and data. This would provide a comprehensive view of the changes in the river's condition. Additionally, organizing field trips or visits to the Thames to observe the pollution and its impact firsthand can also be effective in raising awareness.
Learn more about pollution in the Thames