Sydney Morning Herald: WITH new research showing that the world’s forests are absorbing less man-made carbon dioxide each year, two Australian scientists said some plants could store CO2 for thousands of years. Grasses such as wheat and sorghum can store large amounts of carbon in microscopic balls of silica, called phytoliths, that form around a plant’s cells as they draw the mineral from the soil, a report in the latest issue of New Scientist says. When a plant dies, the phytoliths, or plantstones, …