US chemist who was awarded the Nobel Prize for Chemistry in 1961 for his study of the assimilation of carbon dioxide by plants. Using radioactive carbon-14 as a tracer, he determined the biochemical processes of photosynthesis, in which green plants use chlorophyll to convert carbon dioxide and water into sugar and oxygen.
White represents a desire for peace and liberty. Green symbolizes freedom and agricultural wealth. Red stands for the courage of spilt blood of the freedom fighters. Effective date: 22 November 1990.