Mostly because they believed that Britain needed them. They relied on Britain getting cotton and other resources from them while in reality the British didn't need it as much, which meant that their plans were wrong from the start and that they would eventually fail economically. This is why their economy started failing and their money started losing value so they couldn't manufacture things and they couldn't sell them which meant that they couldn't sustain the war effort and and couldn't sustain their struggle. Eventually they lost the civil war because of things like this.
It has done this because when they have to extend a train track or the road they have to get rid of a forest that is growing just because they want more people to get around and travel. Also they have to do this because imagine of you are just driving through a forest and then a tree is leaning and then it gets in the way of the road when it falls.
