Original sentence: Sao Paulo, Brazil.Since North America has a higher tourism rating than Europe until the 1990s, North America-based airlines can afford more airplanes and routes for a better risk-profit potential than European-based airlines.The introduction and quick obsolescence of commercial supersonic aircraft (2007-2016).They include 1955-1975 (which depicts the dawn of jet airplanes), 1970-1990 (which depicts a period of unstability, oil crises, and the end of the Cold War), 1985-2005 (which depicts the present day of economic prosperity and relative stable peace), and 2000-2020 (which depicts the replacement of jet planes with supersonic airplanes, the European Union extending to Russia, and countries trying to get airlines to fund alternative fuel research)
Edited sentence: Since North America has a higher tourism rating than Europe until the 1990s, North America–based airlines can afford more airplanes and routes for a better risk-profit potential than European-based airlines.São Paulo, Brazil.The introduction and quick obsolescence of commercial supersonic aircraft (2007–2016).They include 1955–1975 (which depicts the dawn of jet airplanes), 1970–1990 (which depicts a period of unstability, oil crises, and the end of the Cold War), 1985–2005 (which depicts the present day of economic prosperity and relative stable peace), and 2000–2020 (which depicts the replacement of jet planes with supersonic airplanes, the European Union extending to Russia, and countries trying to get airlines to fund alternative fuel research)