These changes may have resulted in earlier snow melt and exposure of darker rocks, soil and sea ice, leading to warming throughout Greenland in the late 19th and early 20th Centuries when soot levels were at their highest.

BBC: Human activities have left a visible mark on the Arctic

To encourage such developments the project's partners are trying to identify how the potency of herbs varies with exposure to the sun, the type of soil in which they are grown, and when and how they are harvested.

ECONOMIST: India is testing its traditional medicines

GARCIA-NAVARRO: Some bear the signs of exposure to the elements, rafters who have made it to American soil.

NPR: Miami's Cuban Exile Community Evolves Again