ABSTRACT
In the 1990s, the Intergovernmental Panel on Climate Change (IPCC) developed different scenarios of gas emissions for the long-term, and these scenarios were considered useful tools in analyzing climate change, its impacts, and options to mitigate this change. In 1995, these scenarios were evaluated and the outcomes of this evaluation led to some recommendations such as significant changes in the understanding of driving forces of emissions and methodologies that should be addressed. In 1996, IPCC reached a decision to develop a new set of scenarios which were reported in 2000 (see also Chapter 3) (IPCC 2000, 2007).
