A tanker truck passing the Chevron oil refinery in Richmond in 2010. It’s one of the many California facilities that must use carbon dioxide emission allowances under the state’s cap-and-trade program.
A tanker truck passing the Chevron oil refinery in Richmond in 2010. It’s one of the many California facilities that must use carbon dioxide emission allowances under the state’s cap-and-trade program. Paul Sakuma Associated Press file
A tanker truck passing the Chevron oil refinery in Richmond in 2010. It’s one of the many California facilities that must use carbon dioxide emission allowances under the state’s cap-and-trade program. Paul Sakuma Associated Press file