Stagnant Water

In 7th grade science I remember being introduced to this tiny one celled organism. A little blob of an animal that can't be seen without a microscope; The amoeba. What they failed to tell us is that some of these creatures can be very dangerous to humans. They can be responsible for diseases such as
dysentary. They can also be very helpful. They eat tiny bits of decaying plant and animal matter. They are also an important link in the food chain.

Many other disorders can be cause by these little beasties. In Hawaii, one species was supposed to cause a slow, progressive blindness. Other species can cause death. Its a good practice to avoid stagnant water. Many of the deadly amoeba thrive in these environments. Just a friendly health warning, don't listen if you don't want to :)