Take nuclear power - a source that produces no greenhouse emissions.

- Does air travel really only cause 2.5% of greenhouse emissions?

We account for almost 20 percent of the world's man-made greenhouse emissions.

There's just no way we can reduce greenhouse emissions enough to make a difference.

The administration has made significant efforts to reduce greenhouse emissions over the longer term.

Why not plan for both prevention and coping with the likely effects of greenhouse emissions?

Its main focus was to reduce greenhouse emissions to about 45-65% of the 2003 levels.

The goal was set for the year 2050 with a decrease of greenhouse emissions starting in 2020.

The goal was set for the year 2050 while a decrease of greenhouse emissions would be noticed in 2020.

Political support for deep reductions in greenhouse emissions has been strong across Europe.