SEND the artists to dye 9 trees with liquid dye!
a stain (usually used like this : しみをかける）
|( を ) そ＊める||
to dye one's hair
|( が ) そ＊まる||
to be dyed, colored, stained
pollution OR contamination. (BOOBOO : If you want to say "environmental pollution," you have to use 汚染、 not 公害。)
The TREE's bark contains dye.
When it rains, it drips down and paints the EARTH around the tree.