The United Nations' climate change body has put geoengineering back on the agenda as a potential means of dealing with worsening global warming.

A report released by the UN’s Intergovernmental Panel on Climate Change (IPCC) has triggered controversy within the scientific and environmental community by making guarded reference to “geoengineering” in its summary. Geoengineering, also referred to as “climate engineering,” involves the use of artificial means to tinker with the Earth’s atmosphere. At…