Searching for the Summer by Joan Aiken Why do the children giggle when the
older folks talk about "back when the
sky was blue"?

A) There is a running joke they've
heard about a green sky.
B) Their grandparents have
constantly lied to them about
the skies above the clouds.
C) At school, they are taught that blue skies are unhealthy.
D) They think it is ridiculous.
They've never seen a blue sky.