Use reusable bags vs. plastic ones. (Americans throw away 100 billion plastic bags annually. That’s ~307 per person!)
Reduce carbon emissions by turning off lights, unplugging electronics, adjusting your thermostat, and walking more. (In the last 50 years, the ocean has absorbed 90% of excess heat created by burning fossil fuels. That’s led to warmer waters, which can affect where fish swim, bleach coral reefs, change how marine species reproduce, speed sea-level rise, and alter weather events on land.)