Filters can rid water of pollutants directly at the source.
Now, an LA-based startup is aiming to remove CO2 from seawater. Why?
The world’s oceans store around 30% of annual CO2 emissions and can absorb 150 times more of the gas than air. But as coral death shows, the situation is far from ideal.
The new process sees carbon dioxide, calcium and magnesium removed from the water through electrolysis and converted into limestone, which sinks to the ocean floor. Hydrogen occurs as a by-product.
With the ocean’s acidity taking a dive, seawater can start absorbing more CO2 from the air. Two pilot plants are currently removing 200 kg of it daily.
Trains can help, too. CO2 even has culinary potential.
