Original sentence: As a country develops, the marginal value of cleaning up such pollutants makes a relatively large direct improvement to the quality of citizens' lives.The transition from an agrarian sector to urban industrialization, in which we see a growth in income inequality as income in agriculture is relatively low compared to income earned in the city
Edited sentence: As a country develops, the marginal value of cleaning up such pollutants makes a large direct improvement to the quality of citizens' lives.The transition from an agrarian sector to urban industrialization, in which we see a growth in income inequality as income in agriculture is low compared to income earned in the city