Answer: The release of methane from thawed permafrost
Explanation:
With increasing global warming, permafrost in the arctic is melting. The carbon and methyl clathrates present in permafrost escape into the atmosphere to form carbon dioxide and methane, both greenhouse gases.
In the Arctic, molecules of methane are trapped in ice crystals as methyl clathrates. When the temperature increases, these crystals release methyl clathrates which become methane when in contact with the atmosphere.
The cause of the increasing atmospheric 
is due to the the thawing of dead organisms present in the permafrost. As the permafrost melts, these organisms decay and release into the atmosphere.
Answer:
Deposition is both constructive and destructive.
Explanation:
Constructive forces include volcanic eruption.
Destructive forces include weathering and erosion.
Answer:
The correct answer is - physical and human geography.
Explanation:
Environmental geography is the branch of geography that explains the spatial aspects of the interaction between the physical environment or natural world and humans. Ecological geography connects physical and human geography or ecosystem.
Environmental geography is a branch of geography that deals with the social relationships and economic interconnections, between people and their natural or physical environments.
Answer:
Traffic from all four directions must stop.
Explanation:
- The four-way stop sign is also called as all stop sign in traffic management consists of stopping of all the vehicles for all the four directions at the same time of the intersection before crossing it .And was designed to have a low traffic volume and is commonly found in America, Africa and Canada.
Answer:
It should be B. Whether the ash or gas reaches the stratosphere
Explanation:
