text: Against this backdrop, Ghasemzadeh and Jaafar grew leaf and rhizome extracts from two Malaysian young ginger varieties (Halia Bentong and Halia Bara) under ambient (400 ppm) and elevated (800 ppm) atmospheric CO 2 concentrations, studying their antioxidant and in vitro anticancer activities against two human cancer cell lines (MCF-7 and MDA-MB-231). According to the two Malaysian researchers who conducted the analysis, the antioxidant activities of the leaf and rhizome extracts were increased significantly by the elevated atmospheric CO 2 concentration; and they found that the greatest enhancement was observed in the leaf extract. In addition, they say their results showed strong inhibitory activity of Malaysian young ginger varieties on human breast cancer cells, indicating that some compounds in Malaysian young ginger varieties possess anticancer activities and may contribute to the therapeutic effect of this medicinal herb.