Plants uptake essential elements from the soil through their roots and from the air (consisting of mainly nitrogen and oxygen) through their leaves. Green plants obtain their carbohydrate supply from the carbon dioxide in the air by the process of photosynthesis. Carbon and oxygen are absorbed from the air, while other nutrients are absorbed from the soil. Nutrient uptake in the soil is achieved by cation exchange, wherein root hairs pump hydrogen ions (H+) into the soil through proton pumps. These hydrogen ions displace cations attached to negatively charged soil particles so that the cations are available for uptake by the root. In the leaves, stomata open to take in carbon dioxide and expel oxygen. The carbon dioxide molecules are used as the carbon source in photosynthesis.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Having leaves allows plants to absorb nutrients through which medium?
Ah, so.. air

The city is home to many monuments and memorials, most notably those along Monument Avenue. Other monuments include the A.P. Hill monument, the Bill "Bojangles" Robinson monument in Jackson Ward, the Christopher Columbus monument near Byrd Park, and the Confederate Soldiers and Sailors Monument on Libby Hill. Located near Byrd Park is the famous World War I Memorial Carillon, a 56-bell carillon tower. Dedicated in 1956, the Virginia War Memorial is located on Belvedere overlooking the river, and is a monument to Virginians who died in battle in World War II, the Korean War, the Vietnam War, the Gulf War, the War in Afghanistan, and the Iraq War.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many bells are contained in the World War I Memorial Carillon?
Ah, so.. 56

The FAA has been cited as an example of regulatory capture, "in which the airline industry openly dictates to its regulators its governing rules, arranging for not only beneficial regulation, but placing key people to head these regulators." Retired NASA Office of Inspector General Senior Special Agent Joseph Gutheinz, who used to be a Special Agent with the Office of Inspector General for the Department of Transportation and with FAA Security, is one of the most outspoken critics of FAA. Rather than commend the agency for proposing a $10.2 million fine against Southwest Airlines for its failure to conduct mandatory inspections in 2008, he was quoted as saying the following in an Associated Press story: "Penalties against airlines that violate FAA directives should be stiffer. At $25,000 per violation, Gutheinz said, airlines can justify rolling the dice and taking the chance on getting caught. He also said the FAA is often too quick to bend to pressure from airlines and pilots." Other experts have been critical of the constraints and expectations under which the FAA is expected to operate. The dual role of encouraging aerospace travel and regulating aerospace travel are contradictory. For example, to levy a heavy penalty upon an airline for violating an FAA regulation which would impact their ability to continue operating would not be considered encouraging aerospace travel.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When did Southwest conduct mandatory inspections.
Ah, so..
unanswerable