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• Natural causes<br />
Greenhouse gases<br />
– Natural greenhouse gas effect (water vapor)<br />
– Radiative forcing and forcing variability from natural changes (i.e., solar<br />
changes)<br />
• Anthropogenic (human‐related) causes<br />
– Increase of greenhouse gases<br />
• Carbon dioxide<br />
• Nitrous oxide<br />
• Methane<br />
• Halocarbon (a group of gases containing fluorine, chlorine and bromine)<br />
• Ozone<br />
Anthropogenic causes must be taken under control …<br />
IPCC Climate Change 2007, “How do Human Activities Contribute to Climate Change and How do They Compare with Natural Influences?,”<br />
FAQ chapter, pp. 100 (2007).<br />
<strong>Hilmi</strong> <strong>Volkan</strong> <strong>Demir</strong>
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