Chronic diseases, climate change and complexity: the hidden connections

Abstract

SA Fam Pract 2010;52(5):438-445 In this paper the argument is presented that we can expect an increase in chronic diseases within developing countries such as South Africa and that this is largely due to changes in lifestyle, such as diet and exercise. While these lifestyle choices are ultimately made at an individual level, they are often constrained and shaped by powerful environmental and societal forces such as globalisation, urbanisation and mechanisation. These same changes in lifestyle are also intimately linked to increasing greenhouse gas emissions and the development of climate change. A diet more reliant on meat and refined and processed foods has a much higher carbon footprint. Reductions in physical activity are linked to increases in the use of motorised transport and further increases in greenhouse gas emissions. The emergence of chronic diseases and climate change are therefore connected and both stem from unhealthy over- consumption of resources. The emergence of these phenomena can be understood in terms of complexity theory as properties of a complex non-linear social system. Complex systems by their very nature are unpredictable and yet share certain typical characteristics.