Sustainable development and the water-energy-food nexus

The reading discussing “Sustainable development and the water-energy-food nexus: A perspective on livelihoods” argued for the need to incorporate livelihoods, and sustainable livelihoods into nexus frameworks. First, detail what the water-energy-food nexus actually is and what the framework offers. Second, detail what are major differences in approaches to research when comparing sustainable development and sustainable livelihoods. Finally, argue why incorporating sustainable livelihoods into nexus frameworks could prove useful, or problematic.