By Isla Binnie and Simon Jessop (Reuters) – As government officials begin negotiating Wednesday toward a hoped-for deal to protect the wildlife and resources that prop up the global economy, investors are looking for one thing above all – clarity. As the COP15 biodiversity summit kicks off in Montreal, businesses and corporate leaders are pushing for an ambitious agreement with strong policies that will provide guidance to companies seeking to change. In the course of the two-week summit, all 196 governments under the U.N. Convention on Biological Diversity need to agree on how to go about ens…