S. 150 is a multi-pollutant legislative proposal (or 4-P bill) that would establish national
tonnage caps for nitrogen oxides, sulfur dioxide, mercury, and carbon dioxide. The bill
proposes emissions reductions of sulfur dioxide by 81% from 2000 levels, to a 2.25 million ton cap;
reductions of nitrogen oxides by 71% from 2000 levels, to 1.51 million tons; and reductions of
carbon dioxide by 21% below 2000 levels, or 2.05 billion tons. Mercury would be capped at
90% below 1999 levels, or 5 tons.
The Clean Power Act is more aggressive than the Clear Skies Act and the Clean Air Planning Act
both in terms of timing and the reduction targets that it proposes. Like the Clean Air
Planning Act, it caps carbon dioxide emissions.
The Clean Power Act was introduced in the Senate on January 25, 2005 by U.S. Senators Jim
Jeffords (I-VT), Susan Collins (R-ME), and Joseph Lieberman (D-CT). Cosponsors of the bill
include U.S. Senators Olympia Snowe (R–ME), Patrick Leahy (D–VT), Charles Schumer (D-NY),
Joseph Biden (D-DE), Barbara Boxer (D-CA), Hillary Clinton (D-NY), Jon Corzine (D–NJ),
Chris Dodd (D–CT), Russ Feingold (D-WI), Diane Feinstein (D-CA), Edward Kennedy (D-MA),
John Kerry (D-MA), Frank Lautenberg (D–NJ), Jack Reed (D–RI), Paul Sarbanes (D–MD),
and Ron Wyden (D–OR).