The death of Kublai Khan in 1259 marked a major turning point because up to his death, the Mongol Empire was more or less constantly expanding. However, with his death, things started becoming worse and worse eventually as the empire became to big for one emperor to hold it.
To reduce air pollution because carbon emission harms the atmosphere.
Answer:
it provides textual evidence, and provides a statement
Answer:
union leaders negotiating on behalf of a group of workers
