a incomes (nine times in PPP terms). Clearly, per-capita data is an effective and objective indicator that links national circumstances, capacities and equity.
The Paris deal does not represent a transformational change in the global efforts to meet the challenge of climate change. It only modifies how countries approach the problem, and it is still not clear what a low-carbon world would look like. By putting solutions at the heart of the debate, attention now turns to distribution issues and to the obstacles and policy choices.
Former Director United Nations Climate Change Secretariat.
Defined by the IPCC as ‘Sustainable development (SD): Development that meets the needs of the present without compromising the ability of future generations to meet their own needs (WCED, 1987).