In page four the book The Climate Casino. The Author Mr. Nordhaus mentioned  the sources of global warming as far as burning fossils which produces carbon dioxide gases such as CO2  called greenhouse gases which builds up around us and it doesn't go away. It causes change every where around us such as in the temperature and the atmosphere.
 I find it interesting and also agree with what he is  because it only cause for concerns. It's only going to cause more issues such as temperatures that provide greater threats, water and rivers issues. The changes are critical to the our surroundings. It would have a huge impact on people. I also think people need to also be more aware of  the problems when it comes to the changes.