How to improve safety of our food and water ?

What if we told you even a wonderful landscape could potentially reach dangerous levels of pollution? In some regions, human activity has left over invisible harmful elements from as early as Antiquity. Le Dr Sophia Hansson, Researcher in Geochemistry, studies mercury and lead poisoning in mind-blowing stetting of French Pyrénées : with a view to expand her results to other similar environments worldwide, she works on risk assessment to prevent this legacy pollution from progressing in the food chain - ultimately protecting humans and societies