eutrophication– tag –

Ringed by mountains, Armenia’s Lake Sevan supplies water to farms, generates electricity and draws people to its shores each summer. Its water level has risen after decades of heavy withdrawals, yet summer blooms of blue-green algae keep returning. The effort to restore Sevan reaches far beyond the shore, into the fields and villages that shape what flows into the lake.

Nitrogen supports life, but excess reactive nitrogen can travel through the air and settle on forests, grasslands, and lakes. This invisible input can change plant communities, soil chemistry, water quality, and biodiversity.