What was an impact of settlement on the environment of the West?

Settlers created advanced irrigation systems to water their farmland.

Explanation:

Cattle drives caused problems of overgrazing, making the land only suitable for farmland. hope this helps you :)

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.

the united states began searching for a way to reduce oil

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