Worth 45 points! need ! don't just spend 2 seconds on an answer to get points! best answer gets
explain one positive and one negative aspect of manifest destiny using john gast's painting "manifest destiny".
"partial credit will be given to those who just list a positive and a negative aspect. full credit will be given to those that provide an explanation on the impact this had on the united states, the environment, native americans, etc."

Positive: U.S gained more territory, more land means more power, more land to farm and greater profits from growing or making goods. The impact on the land wasn't so good though, the U.S used dynamite to blow up mountains and destroyed a lot of the country by building or taking from the land, it was needed of course but it impacted the environment. 
Negative: hurt the land and the native Americans, the native Americans were forced off of their land and they had to find new places to go. Also, colonists brought over diseases and sickness that hurt the native Americans.
The painting above shows colonists chasing and killing animals, stealing the native Americans food, running Indians off their land, and us plowing land for our use, also us building railroads and creating a big mess. I think the angel represents the lives lost over the manifest.
I hope this was the assignment I thought it was and I hope I got this right! :)