Why the inaction on biodiversity?

HMBM Stuart, M Butchart, Matt Walpole, Ben Collen, A van Strien, Jörn PW Scharlemann, Rosamunde EA Almond, JEM Baillie, B Bombard, Claire Brown, J Bruno, KE Carpenter, GM Carr, J Chanson, AM Chenery, J Csirke, NC Davidson, F Dentener, M Foster, A Galli, JN Galloway, P Genovesi, RD Gregory, M Hockings, V Kapos, JF Lamarque, F Leverington, J Loh, MA McGeoch, L McRae, A Minasyan, MH Morcillo, TEE Oldfield, D Pauly, S Quader, C Revenga, JR Sauer, B Skolnik, D Spear, D Stanwell-Smith, SN Stuart, A Symes, M Tierney, TD Tyrrell, JC Vié, R Watson, Global Biodiversity: Indicators of Recent Declines Science. ,vol. 328, pp. 1164- 1168 ,(2010) , 10.1126/SCIENCE.1187512