Greta Thunberg, climate activist. The 17-year old Swedish climate activist is due to return to Davos this year. Time’s “Person of the Year” in 2019 has a clear message to lawmakers and business leaders: commit to divest from fossil fuels now. “We demand that at this year’s forum, participants from all companies, banks, institutions and governments immediately halt all investments in fossil fuel exploration and extraction, immediately end all fossil fuel subsidies and immediately and completely divest from fossil fuels. We don’t want these things done by 2050, 2030 or even 2021, we want this done now — as in right now,” Greta wrote in The Guardian newspaper.