Carbon pricing schemes will not bring any viable options for developing countries where there are highly vulnerable populations. Policies such as a global carbon tax or emissions trading system , applied to all sectors of the economy , would result in up to 170 million people going hungry , according to Austrian research institute the International Institute for Applied Systems Analysis ( IIASA ) . In research published in Nature Climate Change , the IIASA found the agricultural sector , which is one of the biggest contributors to climate change , needs to adopt smarter ways of working , rather than blanket policies . It suggested the development of more " productive and resilient agricultural systems " in developing economies , and using carbon tax revenues to support food security programmes .
Policies such as a global carbon tax or emissions trading system , applied to all sectors of the economy , would result in up to 170 million people going hungry , according to Austrian research institute the International Institute for Applied Systems Analysis ( IIASA ) . In research published in Nature Climate Change , the IIASA found the agricultural sector , which is one of the biggest contributors to climate change , needs to adopt smarter ways of working , rather than blanket policies . It suggested the development of more " productive and resilient agricultural systems " in developing economies , and using carbon tax revenues to support food security programmes .