SaGAA

  Industrial revolution in the last two centuries has completely changed the Earth’s environment. This can be attributed to, increase in the rate of deforestation, higher consumption of fossil fuels and incessant rise of emission levels that has led to higher concentration of carbon dioxide (CO2) in the atmosphere. It has been well established that CO2 is responsible for global warming and its effect is well documented all over the world. Research has shown that CO2 is also responsible for acidification of oceans.  Oceans  are good absorbers of CO2 as these are capable of absorbing 30 per cent of the CO2 released in the atmosphere.  As CO2 gets absorbed by sea water, series of chemical reactions take place which increase the concentration of hydrogen ions and make sea water more acidic and further cause decrease in carbon ions (NOAA, 2013). Such changes in the ocean chemistry is bound to cause deep impact to the variety of species in it. Ther...

  Over the last century, due to thorough research and development in antibiotics, human beings have been able to combat issues such as common cold and small pox etc. However, this battle doesn’t end here, as there are researcher who indicate that bacteria and viruses are developing resistance towards antibiotics (Skelly, 2017). To top it all, recent research shows that ancient viruses and bacteria which were buried deep under the ice are coming back to life due to the rapid melting of ice in the snow-capped regions around the world. Global warming has been claimed to cause rising sea levels and sea temperature but to add to it, rising temperature is also becoming a reason for bacteria and viruses to come alive. Revich and Podolnaya (2011) while monitoring of soil temperatures at the Siberian cryology stations since 1970, has found positive correlation between air temperature and depth of permafrost layer thawing during summers.They have further observed that between the 1900s and 1...

  United States is one of the Arctic nations, as Alaska is one of its largest State. Alaska comprises a variety of ecosystems such as glaciers, rain-forest, peat lands, meadows and the tundra. Such a variety has led Alaska to have 16 national wild life sanctuaries and it also includes the largest U.S. National Park, The Wrangell-St. Elias with 13.2 million acres(EPA, 2017).Alaska is not only diverse in terms of its ecosystems but it has 229 recognised tribes.These Alaskan’s are culturally, economically, nutritionally still dependent on natural sources and have continued with fishing, hunting of polar bears, seals, caribou and various other traditional food sources (EPA, 2017). But in the recent years they have been facing problems in finding food due to the global warming. It has been observed that over the past 60 years Alaska’s average temperature has increased approximately by 3 degrees Fahrenheit and the winters have become warmer by an average of 6 degrees Fahrenheit which has...