Many people see the potential for large multinationals to contribute to sustainable development...[in] Africa...Unilever and Nestlé are working with the farmers in their supply chains to help them use more sustainable agricultural methods, while also increasing yields and raising incomes...For these companies, such engagements are not only part of their efforts to act as responsible businesses, but boosting the capacity of smallholders and other African businesses helps build more robust supply chains for commodities such as coffee and cocoa...However...many worry that the [Chinese] companies behind many...large projects on African soil do not maintain high environmental standards...