Climate change is widely viewed as one of the biggest threats facing humanity. The impact of global warming can be seen across the world and it is already causing insecurity and uncertainty in food industry supply chains. As a significant CO2 emitter, the food industry is uniquely positioned to tackle the issue through innovation. Katy Askew looks at how food makers can help mitigate - and even reverse - global warming by using their supply chains to rejuvenate farmlands and forests.