How do humans affect valleys?

Answer 1

Earth's crust makes up only about 0.4% of the total mass of Earth, and that includes the mountains. The greatest impact is on climate and weather; mountains block wind flow, cause updrafts and so rain (on the landward side of mountains one gets 'rain shadows'). Streams from mountains have higher energy so erode more rapidly, especially if the lower slopes are deforested by humans. High mountains allow for snowfall which may lead to the formation of glaciers. So a simple question has many and varied answers.

Answer 2

Valleys are caused by the erosion of rivers and/or glaciers; and they serve to provide a conduit for rain water, snow and ice. Over geological time, rivers have a vast effect of geomorphology (the shape of the earth's surface). The Grand Canyon is an example of the effect of a river carving down through a plateau.

Answer 3

V-shaped valleys are formed by the erosive effects of running water and U-shaped valleys are formed by the erosive effects of flowing glacial ice.

Answer 4

.Blasting

.leveling the ground to build buildings

.creating roads- cut through mountains, dig under mountains

Answer 5

They cause localized weather as air raises (cools) and descends (heating up). This effects precipitation.

Answer 6

An earthquake can affect the valley by spreading the valley apart forming a deeper valley also known as rift valley.

Answer 7

YES, WE DO BECAUSE WE CAUSE pulution.