"These results support the conclusion that bighead and silver carp have not yet become established in Minnesota, " said Steve Hirsch, director of the Ecological and Waters Division for the Department of Natural Resources.

WSJ: Study finds Asian carp numbers low in Minnesota

The report, Nurturing Nature highlighted the importance of the natural environment to economic activity - that ecological processes deliver the resources needed for economic progress - but 11 of 15 of the most important UK habitats are declining.

BBC: Jobs or birds: Turning Rio rhetoric into reality

On Day 1 in Burlington, considered by many the heart of green business, John Erickson, professor of ecological economics at the Rubenstein School of Environment and Natural Resources at the University of Vermont, clearly touched a nerve.

FORBES: Are We All Just Homogeneous Globules of Desire?