Lahti, Finland, has invited a group of local residents to try a ‘planetary health plan’ to see if making greener choices could be good for your health. In June, five individuals received personalised regimes put together by Finland’s first planetary health physician, Dr Hanna Haveri. They followed her recommendations for two months with their carbon emissions and overall health being tracked before and after the experiment. Though the size of the study was small, it showed promising results for the concept of planetary health plans. Lahti, named European Green Capital in 2021, is the first cit…