ANSWER: the ring of fire is a major area in the basin of the Pacific ocean where many earthquakes and volcanic eruptions occur.
A. Human Activity
"According to the National Climate Assessment, human influences are the number one cause of global warming, especially the carbon pollution we cause by burning fossil fuels and the pollution-capturing we prevent by destroying forests. The carbon dioxide, methane, soot, and other pollutants we release into the atmosphere act like a blanket, trapping the sun's heat and causing the planet to warm. Evidence shows that 2000 to 2009 was hotter than any other decade in at least the past 1,300 years<span>. This warming is altering the earth's climate system, including its land, atmosphere, oceans, and ice, in far-reaching ways."
https://www.nrdc.org/stories/are-effects-global-warming-really-bad
Hope this helps!</span>
<span>Given the shallow and narrow nature of most lagoons, and their proximity with salt water coastal lakes, these are the outlets that would be seen as the connection between lakes and the open sea. This is due to the ability to transfer the water from one place, to the other place.</span>
The factors that contributed to the environmental problems which exist in Europe was that B. Much of Europe is densely populated.