Because you have to drink it.
Actually clean people are more likely to get lice then dirty people. Lice are attracted to clean hair.
Clean the trash off beaches and persuade people not to litter into the water by handing out fliers or putting up posters.
Don't you mean, what are the reasons to HAVE access to clean drinking water? Which would be to prevent water-borne diseases which kill thousands of people each year.
because they aren't as clean as people can be they will beg for food most likely and/or steal it
A housekeeping department is important in a hotel because people pay for a clean room and want nothing less. Going into a clean hotel makes people more likely to return to the facility.
Several environmental groups try to persuade members of Congress to vote for the Clean Air Act
It may be that they were never trained to do so, or they may not be aware of the importance. It is also possible that there are emotional reasons why they don't bother.
Public bathhouses were a way to get clean when homes did not have indoor plumbing. Some had hot springs which were therapeutic.
People can benefit from clean waterways is that they can help to clean out the water so it can be clean!
People typically clean their toilets about once a week, which amounts to approximately four times a month. However, this frequency can vary based on individual preferences, household size, and usage. Some may clean more often for hygiene reasons, while others might do so less frequently.
not very likely as the world is too clean
When a German's hand is dirty he will generally wash it.