1. Terrestrial land sink over the period 2000–2006 was 2.8 Pg C year –1 ( 2 ) or 10.3 Pg CO 2 year –1 ; forests and woodlands are the dominant component of this sink. Price of a ton of CO 2 in the European Trading Scheme was €25 in April 2008 with €1 ≈ U.S. $1.56.
2. Contributions to accelerating atmospheric CO2 growth from economic activity, carbon intensity, and efficiency of natural sinks
3. Global Forest Resource Assessment 2005 2006
4. C. L. Sabineet al., in Global Carbon Cycle: Integrating Humans, Climate and the Natural World, C. Field, M. Raupach, Eds. (Island Press, Washington, DC, 2004), pp. 17–44.
5. Maximum impacts of future reforestation or deforestation on atmospheric CO2