Experts estimate that a quarter of all the modern-day pharmaceuticals that people rely on started out  - wholly or in part -  as chemicals that occur in plants.
Bomankge ba fopholetsa gore diperesente di le 25 tsa melemo ya segompieno ya sekgoa e batho ba e tshepileng e simolotse - bontlhanngwe jwa yone kgotsa yotlhe fela - e le kalafi e e tswang mo dimeleng.