RIO DE JANEIRO, BRAZIL - Atypical cold spells usually raise a question among the unwary: "If we are experiencing global warming, why is it so cold?" However, global warming is not necessarily limited to an increase in global temperatures.
It may seem paradoxical to discuss global warming and extreme cold, but they are very much related to each other - which may explain the abnormal snow on Brazilian soil.
Global warming is the consequence of the worsening greenhouse effect. The atmosphere has gases such as water vapor and carbon dioxide (CO2) that act as a blanket around the . . .