This paper aims to highlight the absolute competitiveness between positive and normative economics. The article presents this controversy as a pretext analyse specific field of operation ecological approach in economics is needed complex age increasing deficits confronting threats biological social sustainability. Reliable data from biology, physics, chemistry medicine inform us what dangerous....

Ecological restoration attempts to recover the structure and function of ecosystems that have been degraded by human activities. A crucial test of ecosystem recovery would be to determine whether individuals in restored environments are as healthy as those in conserved environments. However, the impact of restoration on physiology of terrestrial animals has never been tested. Here, we evaluated...

INTRODUCTION Many tracts of native vegetation still remain in the western portion of that vast North American grassland known as True Prairie. Some are mowed annually for the crop of excellent forage, but far greater areas are now in native pasture (Weaver & Fitzpatrick 1932, 1934). One result of the long years of study of the grazed portion of this grassland was the recognition of the manner i...