The people at Preem.se – the Swedish organization responsible for this advertisement – must think this is the way to promote environmental protection with a younger generation of people (nerds?), for whom the digital realm is their first nature.
Press [CTRL] [S] to save the environment. And when things go utterly wrong, you can always press [CTRL] [Z] to undo your actions. No?
See also: Fake XP grass, Global Warming Ready Campaign, Image of Nature, Hurricane$ Approaching. Thanks Johan.