Big oil firms came under pressure at the start of the World Economic Forum (WEF) from activists who accused them of hijacking the climate debate, while a Greta Thunberg-sponsored "cease and desist" campaign gained support on social media.
Major energy firms including BP, Chevron and Saudi Aramco are among the 1,500 business leaders gathering for the annual meeting in the Swiss resort of Davos, where global threats including climate change are on the agenda.
