An individual small business has a relatively small carbon footprint. But together, these businesses have a huge impact — both on the planet and on the communities in which they operate. What’s more, many of the key innovations that will enable businesses and consumers to cut their emissions will almost certainly be developed by small businesses. To reach the global climate goal of halving emissions by 2030, we can’t leave behind small-to-medium-sized enterprises (SMEs). But helping them will require collaboration and support from the large corporations that are often SME’s most important clients.