Sustainability experts and business leaders discuss the challenges and opportunities of committing to renewable energy targets.

Pressure is growing on businesses to become more sustainable, thanks to initiatives such as the Paris Agreement on climate change, national and local targets to cut carbon emissions, and more environmentally-conscious consumers.

A number of the world’s biggest companies, such as Ikea, Mars and Tesco, have committed to work towards using 100pc renewable electricity in their operations as part of the RE100 initiative, meaning that all of their power comes from sources such as wind, solar or