We want the world's largest economies, including the United States, to be part of a global arrangement. An approach in which only some are committed to acting cannot be environmentally effective.

We want the world's largest economies, including the United States, to be part of a global arrangement. An approach in which only some are committed to acting cannot be environmentally effective.

We don't want to be prejudging outcomes here," she said of US opposition to scientific guidelines for rich nations to cut emissions by 25-40 percent below 1990 levels by 2020. "We dont want to be predetermining what will come out of this process.