Aqueducts did not affect the size of the Roman Empire as this was determined by other factors which were independent from them. They did contribute to prosperity as they supplied the towns with clean water and meet their level of demand. Water was used (and still is) both for cleaning and hygiene (which were important in the cities which were crowded and packed into city walls) and for manufacturing processes. Since the Roman Empire relied on and promoted trade, the urban economy was important.
Corn.
Yes he did. He created the tetrarcy (rule by four) whose purpose was to improve the deference of the vast frontiers of the Roman Empire, which were under constant attack. He appointed Maximian as his co-emperor. Maximian was in charge of the western part of the empire and Diocletian took charge of the eastern part. These two men were senior emperors (Augusti). The junior emperors (Caesars) subordinate to the Augusti were appointed. They were responsible for the most troubled frontier areas, the river Rhine in the west and the river Danube in the east.
Originally there were two tribunes elected, but by the end of the republic their number had grown to ten.
It was a very popular name up until the 1940s, and has since grown less popular.
The cereal grains, oats, rye, barley and wheat, were important. Root vegetables were grown and stored over winters. Fruit was grown and eaten fresh, dried, or made into wine or cider. Cabbage family plants were grown, as were peas and fava beans. Fresh greens, such as lettuce, were grown. Certain spices and seasonings were grown in Europe, most importantly mustard.
cacao plants
Corn.
Any administration that grows is called an "Empire", not the other way round. Whatever it is, if it hasn't grown large, it's hardly an empire.
Typically, wheat and barley were grown in Spain.
Organic products are grown without using synthetic fertilizers and pesticides.
I do not think there is a name for food grown without pesticide. There is a name for foods grown with pesticides (normally infers chemical pesticide) and there is also a name for foods grown with organic pesticides. But these are two completely different animals.
The Romans stopped expanding their empire because it had grown too big and had become difficult to defend.
It helped us because it led to a great increase production of the short-stable cotton grown in muck of the south making the region prosperous
It imported the slave-grown cotton and sugar-cane.
It will get dry
Unlike the Greeks, who were primarily interested in knowledge for its own sake, the Romans were very practical. They tried to apply the knowledge they gained from science to planning their cities, building water and sewage systems, and improving farming methods. Without these aqueducts and a superior sewer system, Roman cities could not have grown as large as they did.
Yes, it is called hydroponics.