Environment Agency finds Monsanto, BP and Veolia liable for clean up after thousands of tonnes of cancer-causing chemicals...dumped in Welsh quarry [in the 1960s and 70s]...Monsanto has agreed to help clean-up a quarry in South Wales it is accused of polluting with a cocktail of toxic substances despite consistently refusing to accept liability…Investigations since have revealed the site is heavily polluted with dangerous toxins leaking from corroding waste containers buried underground...In a statement to the Ecologist the company still refuses to accept liability, but expressed a willingness to 'play a minor role' in cleaning up the site...Veolia were unable to comment but a spokesperson for BP said it was cooperating with the Agency...