A recent study by researchers at The University of Manchester and published in the journal Food Research International has looked at the carbon footprint of chocolate and its other environmental impacts. It has done this by assessing the impacts of ingredients, manufacturing processes, packaging and waste.
The study estimates that the UK chocolate industry produces about 2.1m tonnes of greenhouse gases (GHG) a year. This is equivalent to the annual emissions of the whole population of a city as large as Belfast. It also found that it takes around 1000 litres of water to produce just one chocolate bar.