How might countries go about changing their c02 emissions ? What , if anything , should be done about these countries C02 emissions ?

The countries should take the following steps to reduce the carbondioxode emissions in the atmosphere.

1) Basically high amount of carbondioxode gas is emitted from vehicles. So if the government reduces the number of vehicles or use those vehicles that are environmental friendly like solar vehicles. So the concentration of carbondioxode will be reduced.

2) Grow such type of organisms which uses the carbondioxode. Such type of organisms are plants. Grow more plants, so the concentration of carbondioxode is reduced.

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.