1. Environmental Performance Review,1995
2. Environmental Aspects of Wind Generation;Parliamentary Office of Science and Technology,1994
3. The Environmental Implications of Renewable Energy Technologies - Interim report ETSU May 1996. Ref. 18504084/Z/6. The figures on Table 1 were taken from page 36 of this report.
4. Atmospheric Methane: Sources, Sinks and role in Global Change,1993
5. Environmental Aspects of Wind Generation;Parliamentary Office of Science and Technology,1994