Birla Cellulose of the Aditya Birla Group has been ranked Number one globally by the NGO Canopy, in its Hot Button Report for it work on the conservation of ancient and endangered forests. Birla Cellulose has a ‘light green shirt’ ranking in the updated and expanded edition of the Hot Button Report released recently, which ranks eleven viscose rayon producers that represent 70 per cent of global viscose production.