Factors responsible for environmental improvements in eastern europe during the 1990s included:

car ownership trends
eu membership
industrial closures
international investment
privatization
the end of collectives
the end of the soviet union

Who ever answers first gets ! trade in the vedic age led to a.the rise of kingdoms because of the importance of controlling land and long-distance travel routes b.the building of an extensive system of roads because of the difficult terrain c.the creation of a large banking class because of the need to exchange different currencies d.the development of a centralized government that controlled the economic decisions of its people