In environmental news, a new study says the world can still avoid the worst of global warming if current European Union proposals for cutting greenhouse gases are adopted. A computer simulation by National Center for Atmospheric Research based on a 70 percent emissions cut found world temperatures will still increase but not to an unsustainable level. The Arctic sea shelf would still shrink but not completely disappear, while about half of changes in droughts and floods could be avoided. Heat waves would also be 55 percent less intense.