 In 2006, the Parliamentary Commissioner for the Environment proposed to undertake a review of the environmental performance of the company in 2008.Solid Energy has also been criticised by the Ngawakau Riverwatch group and environmental groups and organisations such as Greenpeace, Forest and Bird, The Buller Conservation Group and the Save Happy Valley Coalition.The criticisms include carbon emissions, environmental damage and greenwashing in respect of the impacts of mining.