YEREVAN, Oct. 23 (Xinhua) -- "Nature doesn't have an advocate or a lawyer to defend its interests. And so this is very important that the law guarantees protection for the weak," Norbert Barlocher, a councilor of the International Union for Conservation of Nature, told Xinhua on Wednesday on the sidelines of the 17th meeting of the Conference of the Parties to the UN Convention on Biological Diversity (COP17). Th