Here is your science news for the week of April 23. Climate researchers in Japan and California studied two sets of short-lived pollutants, nitrogen oxides and carbon monoxide, both produced by burning fossil fuels.
Nitrogen oxides are a major ingredient of acid rain.
However, if carbon monoxide emissions fall at the same time nitrogen oxide levels do, computer models suggest a net global warming effect occurs. Several air quality strategies seek only to limit nitrogen oxide levels, in order to control ozone levels in the lower atmosphere and reduce smog. And that s your science news for this week. Here is your science news for the week of April 30. Here is the Web site guide for the week of April 30.