Explanation:
waterfalls are temporary features of rivers because stream erosion is greatest at waterfalls and rapids. The water that falls at the base of the waterfall erodes rock there, leaving the rock at the tops of the waterfalls to overhang. Overall, undermining causes waterfalls to recede farther upstream.
Answer:
During the 1960's the disclosure of enormous gas and oil fields in Alaska accelerated the change of most coal framework to other petroleum products. During this period Usibelli Coal Mine bought the Suntrana mine and the mining activities in the Matanuska coal fields stopped activity.
Answer:
ok there is the yemen civil war,syiran civil war ,iraqi insurgencys,kurdi insurgeny fight iran and many more. why should you be concerned? the u.s.a could get involved and casue more damage, also russia is supporting the syiran government if the us gets involved it could cause a bigger conflict hope this helps
Explanation:
Under the ocean is wet and in continents its dry
