To celebrate, write a letter to green, in any or all of its shades. Think emerald, Kelly, or chartreuse. Think cedar bough, grass, fluorescent lighting, pond scum. If green were a person, who would green be?
Or, as water covers more than two-thirds of the planet, write a poem to blue.
This just learned, according to Wikipedia: “In some languages, including old Chinese, Thai, old Japanese, and Vietnamese, the same word can mean either blue or green.”