Short answers, pulled from the story.
Green is the dominant hue of the visible spectrum between 495 and 570 nanometers. This precise wavelength allows plants to turn sunlight into energy through chlorophyll. The human eye is most sensitive to light at 555 nanometers, which is a yellow-green shade.
The term grene appeared in Middle English and Old English around the year 700. This word springs from the ancient Germanic root meaning to grow. The linguistic connection suggests that early humans perceived green as a vital force and a sign of vegetation and survival.
Scheele's Green and Paris Green were synthetic pigments invented in the 19th century that contained high levels of arsenic. These pigments were used to dye wallpaper, dress fabrics, and food, leading to widespread poisoning and death. Safer alternatives like chrome green and viridian, patented in 1859, replaced the arsenic-laden dyes in the late 19th century.
The Green Party in Germany was founded in 1980. This party later merged with Alliance 90 to become Alliance 90/The Greens. The movement won 11% of the votes in the 2009 federal elections, securing 68 seats in the Bundestag.
Old Chinese, Thai, old Japanese, and Vietnamese all use a single word to describe both blue and green. In modern Japanese, the word aoi is used for both blue and green. The Celtic languages had a term for blue-green-grey, Proto-Celtic *glasto-, which gave rise to Old Irish glas and Welsh glas.