The Arctic is Becoming the Atlantic Ocean
Mostly there is the Global Warming, and it is due to the earth getting nearer somewhat to the sun; other factors like the increased CO2 and methane are only secondary and not that important; that is because the atmosphere is so tremendous that such gaseous increase may not be that important cause.
http://www.quran-ayat.com/universe/new_page_2.htm#Why_the_planet_is_near_or_far_from_the_s
quran-ayat.com/universe/new_page_2.htm#Why_the_planet_is_near_or_far_from_the_s