The book has a strong environmental message that is put clearly and comprehensibly.
And indeed, two of the three books carry an overt environmental message.
Unusually for an action film, it has an environmental message.
This may further elaborate on the environmental message of the album Green.
"It's impossible for my work not to have an environmental message," he says.
It has also been implied the name is meant to send an environmental message.
The book contains science experiments about the ocean with an environmental message.
People think the environmental message is important, and they want to see it promoted.
These days, every mystery set in California seems to arrive with an environmental message.
Coordination of the government's environmental message - whether on routine news or in a crisis - is nothing new.