Domestication and plumbing: what they have in common

1. Step 1. Domestication — is used in — Sakia. It is turned by oxen or donkeys.
2. Step 2. Sakia — is used in — Irrigation. Sakias in Egypt and India.
3. Step 3. Irrigation — includes — Drip irrigation. A kind of irrigation.
4. Step 4. Drip irrigation — has part — Water filter. Water is filtered before the drippers, or the thin tubes clog.
5. Step 5. Water filter — is used in — Water treatment plant. Sand filters.
6. Step 6. Water treatment plant — is used in — Plumbing. Treated water.

Open Evothings