Results may come soon in test of tree response to warming

AP reports that "for more than a decade, the federal government has spent millions of dollars pumping elevated levels of carbon dioxide into small groups of trees to test how forests will respond to global warming in the next 50 years" and "scientists think they are on the cusp of receiving key results from the time-consuming experiments" though the "Department of Energy, which is funding the project, has told the scientists to chop down the trees, collect the data and move on to new research." (Photo: Reuters)