Final answer:
Implementing proper sewage treatment, improving access to clean drinking water, and cleaning up groundwater pollution are effective ways to decrease the number of deaths due to waterborne diseases.
Step-by-step explanation:
The best method for decreasing the number of deaths each year due to waterborne diseases is by implementing proper sewage treatment, improving access to clean drinking water, and cleaning up groundwater pollution. These measures can help prevent the transmission of waterborne pathogens and reduce the risk of infection. For example, by treating sewage and ensuring water sources are free from contamination, the spread of waterborne diseases like cholera, typhoid, and diarrhea can be significantly minimized.
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