city_populations = []
for city in cities:
    city_populations.append(cities[0]['Population'])
city_populations

city_populations = []
for city in cities:
    city_populations.append(cities[index]['Population'])
city_populations

city_populations = []
for city in cities:
    index = 0
    city_populations.append(cities[index]['Population'])
    index =+ 1
city_populations

[{'City': 'Buenos Aires',
  'Country': 'Argentina',
  'Population': 2891000,
  'Area': 4758},
 {'City': 'Toronto', 'Country': 'Canada', 'Population': 2800000, 'Area': 2731},
 {'City': 'Pyeongchang',
  'Country': 'South Korea',
  'Population': 2581000,
  'Area': 3194},
 {'City': 'Marakesh', 'Country': 'Morocco', 'Population': 928850, 'Area': 200},
 {'City': 'Albuquerque',
  'Country': 'New Mexico',
  'Population': 559277,
  'Area': 491},
 {'City': 'Los Cabos',
  'Country': 'Mexico',
  'Population': 287651,
  'Area': 3750},
 {'City': 'Greenville', 'Country': 'USA', 'Population': 84554, 'Area': 68},
 {'City': 'Archipelago Sea',
  'Country': 'Finland',
  'Population': 60000,
  'Area': 8300},
 {'City': 'Walla Walla Valley',
  'Country': 'USA',
  'Population': 32237,
  'Area': 33},
 {'City': 'Salina Island', 'Country': 'Italy', 'Population': 4000, 'Area': 27},
 {'City': 'Solta', 'Country': 'Croatia', 'Population': 1700, 'Area': 59},
 {'City': 'Iguazu Falls',
  'Country': 'Argentina',
  'Population': 0,
  'Area': 672}]