Bacteria can keep carbon dioxide buried safely underground

Scientists have discovered that treating CO₂ with  Bacillus subtilis bacteria and a helping of urea helps secure underground CO₂ storage sites. The bacteria form a protective seal in the storage chambers, and also lower the pH of the saline solution, causing the CO₂ to form calcium carbonate by reacting with the calcium in the rock. It is a stable way to store the CO₂ underground, and it's great for the environment. Read more: New Scientist