The earth is running out of natural resources like land, water and minerals so quickly that if nothing is done, some predictions say that by 2030 humankind will need the equivalent of two planets to sustain our current lifestyle. Those chilling figures come from a famous World Wildlife Fund ‘Living Planet’ report in 2008, but what exactly can we do to reduce our environmental impact—which has got worse since then—and how should we go about doing it? People “desperately” need a means of putting the environmental impact of their products into context, according to Martin Barrow, a senior consultant at...