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Environment

Several start-ups have tried to grow seaweed to remove atmospheric CO2, but this could affect the levels of nutrients in the ocean and hamper other CO2-sucking processes

Environment

Environment

Comment

Environment

Environment

Environment

Environment

Environment

Environment

The global average concentration of CO2 surged by 3.5 parts per million to reach 423.9 ppm last year, fuelling worries that the planet’s ability to soak up excess carbon is weakening

Environment

Environment

Environment

Environment