Answer to Question 1
c
Answer to Question 2
The change in terminology is due to the complexity and variations in which global warming manifests itself. Climatologists point to extreme weather events, from heat waves to droughts to floods, which will likely occur with greater frequency in this century. We may see so-called hundred-year storms like Hurricane Katrina happening several times in a single generation as tropical storms are able to gather greater force from the additional heat and evaporation given off by warming oceans. Because of the variety of environmental changes that warming temperatures are producing, a growing number of scientists prefer to use the term climate change instead of global warming.