Red Tide Surprise from Recipes for Disaster, 2019

INGREDIENTS
Coastal cities
Nitrogen and phosphate-rich agricultural fertilizer runoff
Toxic algae
Seawater
Carbon dioxide

Mince coastlines
Pulverize wetlands and mangroves
Add zest of human-made pollution
Sweeten with fertilizer runoff to feed toxic algae
Stir vigorously with fierce storms
Gradually warm seawater until it runs red with algal bloom
Dissolve sea life