The CO2 concentration can be reduced by:

c. Alternative energy sources: Using renewable energy sources like solar, wind, and hydroelectric power can significantly reduce CO2 emissions. These sources do not burn fossil fuels to generate electricity, thus they do not release CO2.

d. Improved efficiency: By improving energy efficiency in industries, buildings, and transportation, we can reduce the amount of energy we use and thus the amount of CO2 emissions. This can be achieved through various means such as using energy-efficient appliances, improving insulation in buildings, and using more fuel-efficient vehicles.

Options a. Fossil fuel and b. Increasing energy consumption would actually increase CO2 concentration, not reduce it. Burning fossil fuels releases CO2 into the atmosphere, and increasing energy consumption, especially if the energy is generated from fossil fuels, would also lead to higher CO2 emissions.

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The CO2 concentration can be reduced by:

c. Alternative energy sources: Using renewable energy sources like solar, wind, and hydroelectric power can significantly reduce CO2 emissions. These sources do not burn fossil fuels to generate electricity, thus they do not release CO2.

d. Improved efficiency: By improving energy efficiency in industries, buildings, and transportation, we can reduce the amount of energy we use and thus the amount of CO2 emissions. This can be achieved through various means such as using energy-efficient appliances, improving insulation in buildings, and using more fuel-efficient vehicles.

Options a. Fossil fuel and b. Increasing energy consumption would actually increase CO2 concentration, not reduce it. Burning fossil fuels releases CO2 into the atmosphere, and increasing energy consumption, especially if the energy is generated from fossil fuels, would also lead to higher CO2 emissions.

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The CO2 concentration can be reduced by:

c. Alternative energy sources: Using renewable energy sources like solar, wind, and hydroelectric power can significantly reduce CO2 emissions. These sources do not burn fossil fuels to generate electricity, thus they do not release CO2.

d. Improved efficiency: By improving energy efficiency in industries, buildings, and transportation, we can reduce the amount of energy we use and thus the amount of CO2 emissions. This can be achieved through various means such as using energy-efficient appliances, improving insulation in buildings, and using more fuel-efficient vehicles.

Options a. Fossil fuel and b. Increasing energy consumption would actually increase CO2 concentration, not reduce it. Burning fossil fuels releases CO2 into the atmosphere, and increasing energy consumption, especially if the energy is generated from fossil fuels, would also lead to higher CO2 emissions.

he CO2 concentration can be reduced bya.fossil fuelb.increasing energy consumptionc.alternative energy sourcesd.improved efficiency

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