Australian Greens Revelations by The Guardian showing land in western Sydney was sold as biodiversity offsets for millions of dollars more than what it was bought for by individuals who worked for the environmental consultancy recommending the offsets, essentially amounts to insider trading and must be urgently investigated, says Greens MP and environment and wildlife spokesperson Cate Faehrmann. Last week, Greens MP Cate Faehrmann wrote to the Auditor General to audit the Biodiversity Offsets Scheme and the Biodiversity Conservation Trust, and to the ICAC, after a Guardian investigation revelations that a number of employees of the private companies involved in offsets were making huge gains by buying up land they knew would be required for offsets for major projects in western Sydney and then selling that land as offsets back to the government.