Scientific American: The 38 countries that pledged to restrain their emissions of climate change–inducing greenhouse gases, most notably carbon dioxide (CO2), are failing, according to new figures released today. The United Nations Framework Convention on Climate Change (UNFCCC), the body charged with overseeing global emission reduction efforts, says that, overall, greenhouse emissions–measured in terms of the most ubiquitous: carbon dioxide equivalent (CO2e)–dropped by 894 million metric tons between 1990 …