High Quality Content by WIKIPEDIA articles! Zeolitic imidazolate frameworks (ZIF) are metal-organic framework carbon dioxide sinks which could be used to keep industrial emissions of carbon dioxide out of the atmosphere. ONe litre of the crystals could store about 83 litres of CO2. THe crystals are non-toxic and require little energy to create, making them an attractive possibility for carbon capture and storage. "The porous structures can be heated to high temperatures without decomposing and can be boiled in water or solvents for a week and remain stable, making them suitable for use in hot, energy-producing environments like power plants."