What you buy in the supermarket can change the world 

Graphic design is used for various purposes, two major ones being advertising and campaigns. One category of these are the ones put out by corporations to promote their sustainability practices. They often use the visual language of environmentalism and nature to make themselves seem legitimate. In this particular case, the background image is a forest. This gives the ad an air of legitimacy. Forests are associated with nature and growth; in this particular case, it's talking about the impact of palm oil on rainforests. The overall message of the campaign puts the onus on the consumer rather than on the corporations or governments to make wider change.