[2] Krupp grew up in Verona, New Jersey, and became acquainted with recycling through his father's company, which used old rags to create roofing material.

[7] During that time he also was founder and general counsel for the Connecticut Fund for the Environment (1978–1984), a state-level environmental group.

[citation needed] Since 1984, when he became president of Environmental Defense Fund, he has been influential in developing several market-based solutions, including the acid rain reduction plan in the 1990 Clean Air Act.

[1] Examples including convincing McDonald's to forgo styrofoam for paper, Wal-Mart to stock energy-efficient light bulbs, and Duke Energy to invest in wind power.

[9] In 2018, Krupp announced that an affiliate of EDF planned to launch an orbital satellite, MethaneSAT, to monitor industrial methane leaks.

[12] Krupp served on the board of the H. John Heinz III Center for Science, Economics and the Environment,[13][14] and the Leadership Council of the Yale School of Forestry and Environmental Studies.