Earth
Los alamos
The highest concentration is located in the lower stratosphere.
New York
New Mexico. Santa Fe (state capital and second largest city) is ranked the # 2 city in the country for the number of PhDs per capita.
Ozone is concentrated at 20-40 km above earth with highest concentration 6-8 parts per million. It is present in the stratosphere of the earth's atmosphere.
The highest concentration is in atmosphere. It is not on crust.
According to data from the OECD, Switzerland has one of the highest rates of PhD attainment per capita, with approximately 2.5 doctorate holders per 1,000 individuals. Other countries with high per capita numbers of PhDs include Sweden, Germany, and the United States.
Stratosphere has the highest ozone concentration. It is present as the ozone layer.
The carbon dioxide concentration would be the highest where the oxygen is low.
The highest concentration of non polluting ozone is in stratosphere. It is present in atmosphere.
The stratosphere contains the highest concentration of the ozone gas. It is present as the ozone layer within it.
There is no standard collective noun for a group of PhDs. Some that are close are a faculty of academics or a pomposity of professors.However, collective nouns are an informal part of language. Any noun the suits the situation can function as a collective noun; for example, a pomposity of PhDs, a profusion of PhDs, a puzzlement of PhDs, etc.