Herbaria, collections of dried plant specimens, are valuable resources for studying how plants have responded to global environmental changes over the past centuries. By analyzing these specimens, scientists can track the effects of pollution, habitat loss, climate change, and invasive species on plant species. The large size of herbaria, along with advances in digitization and DNA sequencing, make them crucial for understanding ecological and evolutionary changes. These collections provide a unique window into the past, offering insights into how plants have adapted to changing environments.