We must study marijuana’s impact on the environment before it’s too late

Often featuring in the lower rungs of priority when it comes to determining the safety of a drug, the impact of a pharmaceutical on the freshwater environment can be significant. The worrying gamut includes limpets in the UK no longer able to cling on to rocks for survival as they “bathe in a soup” of antidepressants. Legalisation will spread this, the Guardian reports.