A separate article discusses a new research technique used to link atmospheric concentrations of carbon dioxide and global temperatures. By examining pores in plant fossils up to 300 million years old and those of existing plants, a University of Oregon researcher has been able to estimate atmospheric concentrations of CO₂ and demonstrate that the gas has been an important driver of climatalogical conditions on earth.

Key Clean Air Act provision under scrutiny
An important section of the Clean Air Act requires coal-fire power plants to install more advanced air emissions controls in the event the plants undergo major modifications. This provision is now being reconsidered under President Bush's energy plan. Steve Curwood, host of National Public Radio's Living on Earth program discusses the issue with reporter Anna Solomon-Greenbaum.

Some in energy industry OK with tougher air rules
Not all energy companies are of the same mind when it comes to the extent government should regulate air emissions. The New York Times reports that some companies stand to lose out as the Bush administration continues to oppose international and domestic restrictions on gases linked to global warming. That's because the companies have already spent millions on voluntary efforts to cut emissions. One analyst says conflicting opinions within government and industry have resulted in a "three ring circus" of lobbying.

Global 4 to 7 Degree Temperature Rise Likely by 2100
Overwhelming odds point to global average temperatures that will rise 4 to 7 degrees over the coming century, according to a new probability analysis by scientists in the United States and Europe. As early as 2030 the planet is likely to heat up 1 to 2 degrees, say the scientists. A one-degree temperature rise was observed over the past century. The full story is available on the National Science Foundation News web site.