Why does a blue sky have white clouds? Why do the clouds appear red at sunset. What is the “Green Flash seen in some sunsets in Hawaii?

Why does a blue sky have white clouds Why do the clouds appear red at sunset. What is the “Green Flash seen in some sunsets in Hawaii
1-should be a double spaced, one page entry with one inch margins, 12pt font and name on the top.
2-References (with whatever format you are comfortable using)should be included at the end of your paper. At least 2 references per paper(not from the course material).