Describe at least one problem people had when trading.( please helppp!)

How did dynasties end and how did new ones start?

The economy of the united states is best described as

What recommendations would you give to your local community to to decrease the local effects of human impact on the environment? list 2 recommendations and how they will positively impact your community. 3. what recommendations would you give to the global governments to decrease the global effects of human impact on the environment? list 2 recommendations and how they will positively impact our planet.