Pollen allergy season is here and getting longer every year, but not because of climate change - earth.com

New analysis indicates that artificial nighttime lighting in and near cities disrupts plant seasonal timing and is lengthening pollen seasons, increasing exposure for urban residents. Separate research finding that climate change can cause heritable gene-regulation changes shows that environmental forces can alter biological timing through different pathways—immediate, local effects like light pollution and longer-term, inherited regulatory shifts driven by climate. Together these studies highlight multiple ways human-caused environmental change reshapes organism timing and health risks.