CO2 levels breach Danger Zone
The latest scientific report on global warming (NYT/AFP) states that the most heat trapping gas in the atmosphere, carbon dioxide, has by 2013 passed a long feared milestone of more than 400 parts per million. The level has not been this high for the last 3 million years, at a time when the world’s ice caps were smaller and sea level higher. The report warns that the climate is beginning to react, with larger changes in the future. Experts fear that humanity may be precipitating return to prehistoric conditions – except that this time billions of people are in harms way.