natural drainage hole
71North Sea — For other uses, see North Sea (disambiguation). North Sea Location Atlantic Ocean Coordinates …
72Kolkata — Calcutta redirects here. For other uses, see Calcutta (disambiguation). Kolkata (কলকাতা) City of Joy, Cultural Capital of India, Literary Capital of India, City of Furious Creative Energy, City of Palaces, City of All Cities, City of Bridges in… …
73Extraction of petroleum — Pumpjack on an oil well in Texas The extraction of petroleum is the process by which usable petroleum is extracted and removed from the earth. Contents 1 …
74Death Valley National Park — IUCN Category II (National Park) …
75Gorges State Park — North Carolina State Park Natural Monument (IUCN III) …
76Floride (État) — Floride Pour les articles homonymes, voir Floride (homonymie). Florida State of Florida Floride …
77Floride (état) — Floride Pour les articles homonymes, voir Floride (homonymie). Florida State of Florida Floride …
78Hydroponics — (from the Greek words hydro (water) and ponos (labour) is a method of growing plants using mineral nutrient solutions, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only or in an inert medium,… …
79River Thames — Thames redirects here. For other uses, see Thames (disambiguation). Coordinates: 51°29′56″N 0°36′31″E / 51.4989°N 0.6087°E / 5 …
80Storm drain — This article describes subterranean tunnels conveying runoff from urban streets. See Combined sewer for a description of early drainage systems designed to use storm runoff to flush sanitary and industrial wastes into natural waterways for… …
