Was the overall impact of the mongol conquest more positive or negative

Negative.

Explanation:

I am biasing of the impact from the point of view of people who were not Mongols. One of the main reasons its negative was the destruction and pillaging they caused, Mongols killed, looted, and other heinous actions to people who didn't want to be under Mongolian Rule. Places like Baghdad, which a Golden Age of Islam was happening, was destroyed and became a barren land because the Mongols sieged it and destroyed its irrigation system, The Mongols also burned crops, diverted rivers and catapulted diseased corpses into cities in order to starve or infect people with deadly diseases. Some historians believe that the use of dead bodies by the Mongols is what brought the Black Death to Europe.

a

explanation:

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: