If carbon dioxide gas is generated in excess, it will accumulate in the atmosphere, causing an unpleasant greenhouse effect in the global climate. In places covered by green vegetation, especially in forests, through photosynthesis, green plants absorb carbon dioxide in the air and emit Oxygen. Therefore, in this sense, the destruction of green vegetation, especially forests, means the production of carbon dioxide. The consumption of plant-generated fuel by factories produces a large amount of carbon dioxide gas, which includes wood, coal, and oil. Which of the following conclusions best supports the above conclusions? ['If the green vegetation on the earth, especially the forest, is severely damaged, the global climate will inevitably have a greenhouse effect.', 'As long as the green vegetation on the earth, especially forests, is effectively protected, even if workers consume excessive amounts of plant-generated fuel, it will not cause the global climate to have a greenhouse effect.', 'If the plant-generated fuel consumed by factories in various countries exceeds a certain limit, it will inevitably cause the global climate to have a greenhouse effect, unless the global green vegetation, especially the forest, is sufficiently well protected.', 'As long as the plant-generated fuel consumed by factories in various countries is controlled within a certain limit, the greenhouse effect of the global climate can be avoided.']