The World Forum on Natural Capital to discuss how businesses can value and protect nature has run into fierce criticism from campaign groups in Scotland and India for hosting companies with controversial environmental records.
Amongst those due to give a presentation is Mary Draves, a global director of the US chemical giant, Dow. Critics hold the company responsible for the fallout-out from 1984 Bhopal disaster in India, which caused 25,000 deaths.
Carina Mueller, a scientist from the UK-Dutch consumer goods firm, Unilever, is also scheduled to address the conference. The company has been attacked for failing to properly clean up mercury contamination and compensate former workers at a thermometer factory in Kodaikanal in South India.
The World Forum on Natural Capital is organised by the Scottish Wildlife Trust and backed by other major environmental groups. Due to take place on 23-24 November in the Edinburgh International Conference Centre, it is expected to attract over 500 delegates from more than 35 countries.