The sentence "Rapid growth in the urban population has aided economic developmen...

Questão de Inglês da banca CESPE CEBRASPE aplicada no concurso Banco do Brasil (2002). Confira a resolução completa abaixo:

The sentence "Rapid growth in the urban population has aided economic development but also created serious problems for major cities" (L.5-7) means the same as

Rapid growth in the urban population has improved economy in major cities, but on the other hand it caused them serious problems.