Global warming has an effect not only in North America but the rest of the world. One of the most evident things is climate change. There was a time when warm, sunny days are comforting but because of the appearance of CFC, hot, summer days are now extremely stiffling and uncomfortable.
There are also obvious changes with the weather. People may experience rain during the summer time and people may experience heat even when it is not supposed to be too hot. People may be able to adjust to these changes but what will happen in the future if people would not change? The world may become even hotter that it will not be able to sustain life anymore.