As December’s landmark climate change summit in Paris (COP21) approached, Ikea made a number of major announcements. It pledged to invest €600m (£471m) in renewable energy projects – in addition to an earlier €1.5bn (£1.2bn) cash injection – and a further €400m (£314m) to support communities vulnerable to climate change. The world’s biggest furniture retailer says it’s going “all in” to have a net positive impact on the climate through renewable energy investment, energy-efficiency measures,…