This chapter is designed to teach you: 1  The shifts in perspectives throughout American history. 2  Characteristics of various literary periods. 3  Famous authors and their works.  How to classify American literature within a movement.
Antarctica global warming has become a burning issue of the present time. Global warming in Antarctica will pose a serious threat to the rise in water level. Hence, Antarctica global warming has become a great concern for the scientists and researchers. As most of this continent is covered by ice, the impact of global warming is more acutely felt here. With the increase in the number of automobiles, air pollution has been on the increase in the last 20 years. This is one of the major causes of global warming.
Antarctica can be called a desert because of the low levels of precipitation. Antarctica has the coldest land temperature recorded on the Earth of -89.2Â°C. The average annual temperature is around -50Â°C. The precipitation in Antarctica is mainly snow. In coastal regions about 200 mm can fall annually. In mountainous regions and on the East Antarctica plateau the amount is less than 50 mm annually.