Greenpeace has accused US consumer goods giant Procter & Gamble of responsibility for the destruction of Indonesian rainforests.
In an extensive report, the environmental group says the company uses Indonesian palm oil from suppliers with links to the destruction of ancient rainforest, haze-inducing forest fires and an orangutan "graveyard".
The company uses Indonesian palm oil in its popular household products, including Head & Shoulders and Pantene shampoos and Gillette shaving gel.
"The maker of Head & Shoulders needs to stop bringing rainforest destruction into our showers," Greenpeace's Indonesian forest campaign head Bustar Maitar said. "It must clean up its act and guarantee its customers that these products are forest-friendly."
P&G was not immediately available for comment. The company's website says it is "committed to growing our business responsibly", and has introduced sustainability scorecards for suppliers.
P&G is the latest company to be targeted by Greenpeace as the group seeks to embarrass companies it says source Indonesian palm oil and paper from suppliers that damage the environment.
Greenpeace's campaigns have caused several global companies, including Unilever, Nestle and L'Oreal, to commit to zero deforestation, though some plan to implement their policies in coming years.
Many palm oil and paper companies, such as Asia Pulp & Paper, have made such commitments after losing major clients because of Greenpeace's campaigns.
In its report, Greenpeace links a Malaysian palm oil supplier to P&G with forest fires on Indonesia's island of Sumatra in June 2013.
The blazes cloaked Singapore and Malaysia with a choking haze in the region's worst pollution for a decade.
The report also accuses the same supplier of destroying deep peatland forests, which are dense in carbon stocks, have some of the world's most biodiverse ecosystems, and are prime habitat for critically endangered Sumatran orangutans and tigers.
The report says that on the island of Borneo a "graveyard" of orangutans, including a buried skull, was found in November partly within the concession area of a supplier to P&G.
Indonesia has some of the world's most significant tracts of tropical rainforest and rarest species, but illegal logging and poor law enforcement means deforestation is rampant in the country.
