Scientists have debated for decades whether economies can continue to grow without increasing greenhouse gas emissions. A new study by a Penn State researcher has found that this may be possible, but only under strict conditions and mostly for the world's wealthiest nations. The work includes the analysis of more than three decades of data from nations using the international Organisation for Economic Co-operation and Development's Climate Actions and Policies Measurement Framework (CAPMF) database, which does not include the United States, to examine how climate policies affect the link between economic growth and greenhouse gas emissions.