It was reported in December 2018 that BlackRock is the world's largest investor in coal plant developers, holding shares worth $11 billion among 56 coal plant developers.[101] Another report shows that BlackRock owns more oil, gas, and thermal coal reserves than any other investor with total reserves amounting to 9.5 gigatonnes of CO2 emissions – or 30 percent of total energy-related emissions from 2017.[102] Environmental groups including the Sierra Club,[103] and Amazon Watch[104] launched a campaign in September 2018 called "BlackRock's Big Problem",[105] claiming that BlackRock is the "biggest driver of climate destruction on the planet", due in part to its refusal to divest from fossil fuel companies.[105] On January 10, 2020, a group of climate activists rushed inside the Paris offices of BlackRock France, painting walls and floors with warnings and accusations on the responsibility of the company in the current climate and social crises.[106]