I'd love to hear about it too if anyone has any info. We could perhaps apply the model to the Environmental Technology Centre's 1.7 hectares. Cheers Martin Anda Research Associate Remote Area Developments Group Tel 61 8 9360 6399 Fax 61 8 9310 4997 Environmental Technology Centre Tel 61 8 9360 6123 Fax 61 8 9310 4997 Murdoch University Murdoch WA 6150