ragweed

The most allergenic tree pollens are from birch, cypress, Japanese cedar, latex, grass, and ragweed.

At the same time, pollen records show an increase in ragweed, a shrub known to proliferate in disturbed landscapes.

Three tablets treat grass or ragweed allergies, and a fourth gained approval in 2017 for dust mite allergies.

Important wetlands along the reservoir, including the Velyki and Mali Kuchuhury archipelago, will suffer from desiccation, and ecologists are concerned that invasive plants, such as ragweed and goldenrod, will colonize newly exposed sediment.

The app includes a tracker that monitors allergens such as tree, grass and ragweed pollen.