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Public transport is essential in New York City. 54.6% of New Yorkers commuted to work in 2005 using mass transit. This is in contrast to the rest of the United States, where about 90% of commuters drive automobiles to their workplace. According to the US Census Bureau, New York City residents spend an average of 38.4 minutes a day getting to work, the longest commute time in the nation among large cities. New York is the only US city in which a majority (52%) of households do not have a car; only 22% of Manhattanites own a car. Due to their high usage of mass transit, New Yorkers spend less of their household income on transportation than the national average, saving $19 billion annually on transportation compared to other urban Americans.

How many minutes does it take the average New Yorker to get to work?
Answer: 38.4
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The metal's distinctive natural green patina has long been coveted by architects and designers. The final patina is a particularly durable layer that is highly resistant to atmospheric corrosion, thereby protecting the underlying metal against further weathering. It can be a mixture of carbonate and sulfate compounds in various amounts, depending upon environmental conditions such as sulfur-containing acid rain. Architectural copper and its alloys can also be 'finished' to embark a particular look, feel, and/or color. Finishes include mechanical surface treatments, chemical coloring, and coatings.

What property does the final patina on cooper have?
Answer: highly resistant to atmospheric corrosion
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British air doctrine, since the time of Chief of the Air Staff Hugh Trenchard in the early 1920s, had stressed offence was the best means of defence. British defensive strategy revolved around offensive action, what became known as the cult of the offensive. To prevent German formations from hitting targets in Britain, RAF's Bomber Command would destroy Luftwaffe aircraft on their own bases, aircraft in their factories and fuel reserves by attacking oil plants. This philosophy was impractical as Bomber Command lacked the technology and equipment and needed several years to develop it. This strategy retarded the development of fighter defences in the 1930s. Dowding agreed air defence would require some offensive action, and fighters could not defend Britain alone. Until September 1940, the RAF lacked specialist night-fighting aircraft and relied on anti-aircraft units which were poorly equipped and lacking in numbers.

What was wrong with the anti aircraft units?
Answer:
poorly equipped and lacking in numbers