The Rockefellers, who made their vast fortune from oil, and other philanthropies and high-wealth individuals have pledged to divest $50 billion from investments in fossil fuels.

The Global Divest-Invest coalition announced the new pledges and members on Monday, one day before 120 heads of state were to address the United Nations on how their countries will contribute to a global effort to halt a dangerous rise in temperatures.

Since the divestment movement launched three years ago, some 650 individuals and 180 institutions — including 50 new foundations — holding over $50 billion in total assets have pledged to divest from fossil fuels over five years using a variety of approaches.