This person lives in a city of at least 2 million people. They work in a factory but the rest of their family works on a commercial farm, which is supported by irrigation from the Dnieper River. They enjoy the moderate climate. In what city does this person live?

Kiev, Ukraine.

Explanation:

Kiev is the capital and largest city of Ukraine. It lies on the banks of the Dnieper river, which is navigable for smaller seagoing vessels up to now, and has almost 3 million inhabitants. Kiev is an important educational and industrial location and is also the country's most important transport hub.

Kiev is one of the oldest cities in all of Europe, founded in 482. Today, in addition to being a business center in Eastern Europe, it also has huge tracts of arable land, which is benefited by the climate relatively moderate it has (in winter temperatures rarely drop below -10 degrees Celsius).