They have demonstrated that, after five years of being plunged into liquid nitrogen, banana cell suspensions can be recovered and turned into growing plants.
The agency investigated and found areas for improvement including controlling liquid waste levels and managing the clay cap covering the landfill's operational cell.
Gasification of coal offers the potential to turn dirty burning hydrocarbons into cleaner burning liquid fuels, such as synthetic natural gas, jet fuel and gasoline, as well as hydrogen for fuel cell use, a developing field.