Air pollution — from World War II production Smog over … Wikipedia
Air conditioner — For general aspects of air conditioning, see Air conditioning. A typical home air conditioning unit. An air conditioner (often referred to as AC) is a home appliance, system, or mechanism designed to dehumidify and extract heat from an area. The… … Wikipedia
Natural gas prices — at the Henry Hub in US Dollars per MBtu for the 2000 2010 decade. Natural gas prices, as with other commodity prices, are mainly driven by supply and demand fundamentals. However, natural gas prices may also be linked to the price of crude oil… … Wikipedia
Natural gas vehicle — NGV redirects here. For the art gallery in Melbourne, Australia, see National Gallery of Victoria. Fueling (Fiat Multipla) … Wikipedia
Natural scientific research in Canada — This article outlines the history of natural scientific research in Canada, including mathematics, physics, astronomy, space science, geology, oceanography, chemistry, biology, medical research and psychology. The social sciences are not treated… … Wikipedia
Natural disasters in India — Disaster prone regions in India … Wikipedia
Natural History (Pliny) — Naturalis Historia, 1669 edition, title page. The title at the top reads: Volume I of the Natural History of Gaius Plinius Secundus. The Natural History (Latin: Naturalis Historia) is an encyclopedia published circa AD 77–79 by Pliny the… … Wikipedia
air — I (New American Roget s College Thesaurus) I n. atmosphere (See air); mien, bearing, appearance; tune, melody (See music). v. t. ventilate (See air); proclaim, broadcast (See publication). II Earth s atmosphere Nouns 1 … English dictionary for students
Solar air conditioning — refers to any air conditioning (cooling) system that uses solar power. This can be done through passive solar, photovoltaic conversion (sun to electricity), or solar thermal energy conversion. The U.S. Energy Independence and Security Act of… … Wikipedia
Shutdown of thermohaline circulation — Shutdown or slowdown of the thermohaline circulation is a postulated effect of global warming.There is some speculation that global warming could, via a shutdown or slowdown of the thermohaline circulation, trigger localized cooling in the North… … Wikipedia
Central warm air furnace — A type of space heating equipment where a central combustor or resistance unit generally using gas, fuel oil, or electricity provides warm air through ducts leading to the various rooms. Heat pumps are not included in this category. A forced… … Energy terms