September 16th Slightly Ironic?

We were driving today, and it was a very grey and bleak day (what's new Pussycat?).  The irony of the message on this truck in front of us, was I thought fairly obvious.

Here we have a truck delivering dangerous chemical goods 

And this is the message written at the bottom of his 'curtain'

As I said, it was a very grey and bleak morning, so the photography isn't that great (I was not driving). But the writing says 'If we take care of the Earth, it will take care of us'

I don't know if my brain works in weird ways as to how I see things, but don't you think that is a strange message to carry on a dangerous goods truck?