Your car and home aren’t the only sources of greenhouse-gas emissions. Clothing has an ecological footprint of its own, as well. But African-grown cotton might have a considerably smaller impact on the environment than conventionally grown cotton, according to an independent study commissioned by Cotton Made in Africa, an initiative of the Aid by Trade Foundation to help African smallholder farmers improve their lives through trade rather than handouts. Compared with Pakistan-grown cotton, Systain, an independent consulting firm based in Hamburg, found that cotton cultivated on the continent emits 70 percent less carbon. It also saves around 18,000 liters of water per kilogram of cotton lint.