IEA Bioenergy Task 37
		UK AD portal
		European commission Energy
		EUbionet
		European Anaerobic digestion network
		Anaerobic Digestion Systems Website
		Intelligent Energy Europe GasHighWay project
		Anaerobic Digestion and Biogas Association
		Renewable Energy Association
		German Biogas Association
		Global methane Initiative
		Economic & Social Research Council
		Research Councils UK
		Department for Environment, Food and Rural Affairs
		Biotechnology and Biological Sciences Research Council
		Natural Environment Research Council