What should our construction committee do to make projects in our community sustainable

When zhang qin went to explore west, he brought back stories of

Initially, northerners did not want missouri to be included in the union because 1.) maine would not be allowed to enter the union as a free state 2.) missouri wanted to enter the union as a free state 3.) missouri wanted to enter the union as a slave state 4.) maine would not be allowed to enter the union as a slave state

Why would someone who is studying the history or culture of this time. find this text interesting important or useful?