Transcript Nature*s Water Filters

this video clip
•A healthy watershed has places for
water to sink into the soil, like forests,
grasslands and farms.
•In an UNHEALTHY watershed, rain
cannot be absorbed (due to
pavement, concrete, etc.),
may overflow from water pipes and
sewer treatment plants.
•In nature, water is filtered through layers
of soil, sand, rock, and other natural
materials like leaves.
• To test, dip a strip for 2 seconds. Wait 1 minute.
Then compare your color to the bottle under the
doc cam.
• To test, dip a strip for 2 seconds. Wait 1 minute.
Then compare your color to the bottle under the
doc cam.