The concentration of atmospheric carbon dioxide is currently decreasing due to human activities
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The statement is false or incorrect.

Explanation:

The concentration of atmospheric carbon dioxide is currently increasing due to human activities.

The main materials that are responsible for increasing carbondioxode concentration in the environment is burning of fossil fuels such as petrol, diesel and CNG etc. When these fuels burns in engine of vehicles and industries, the carbondioxode gas is emitted and goes to the atmosphere which causes global warming.

c. heat from the poles back down towards the equator.

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.