What can we do?

I just read an article that says that this is going to be a tough year for the Monarch Butterfly
over the past few years I have read similar things about the decline of the Monarch Butterfly population

what can we do?
my thought...
there can be gardens planted to host the butterflies
how hard could that be?

News Story about Monarch Butterflies being scarce this spring
www.chron.com

Monarch Butterflies on the Wiki Page
http://en.wikipedia.org