The correct answer is - A) Permafrost used to be permanent.
The permafrost used to be permanent until recently, so using certain techniques of building on it functioned properly. But with the climate changes that are becoming more and more evident, the permafrost is no longer permanent, but instead, it is either defrosting in some part of year and then forming again, or has been totally absent from some regions in the present.
That has caused changes in the rules governing building on permafrost. The reason for the changes is that the old techniques do not work properly anymore, and the permafrost changes are making change in the landscape, making big damages on the infrastructure in meantime.
Answer:
A natural feature on Earth's surface is called Landform
Tsunami is one of the forces
The correct answer is - B. 9%.
The United States, even though are one of the biggest investors in the development of usage of renewable energy, are still not very willing to use them as much and are mostly sticking to the nonrenewable energy resources. This is mainly due to the economic factor, and the United States are not a country that accepts any downfall in its economy, especially not if it doesn't have to. This also causes a lot of controversy because it is damaging the environment, and while lots of developed countries are focusing on the usage of the renewable energy resources, the United States refuse to do so even though they are one of the two biggest polluters in the world.
