What are some consequences of increased carbon dioxide concentration in the atmosphere?

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Increased carbon dioxide concentration in the atmosphere has significant and well-documented consequences, primarily related to climate change and its effects on ecosystems and the environment. The correct choice highlights three critical consequences: sea ice disappearance, sea-level rise, and changes in ocean chemistry.

As carbon dioxide accumulates in the atmosphere, it contributes to the greenhouse effect, leading to global warming. This warming causes the polar ice caps and glaciers to melt, resulting in the disappearance of sea ice. The reduction in sea ice not only affects habitats for species such as polar bears and seals but also has broader implications for global climate patterns.

Additionally, the melting ice contributes to rising sea levels, which can lead to coastal erosion, increased flooding, and the loss of habitat for plants, animals, and even human communities situated near coastlines.

Moreover, increased CO2 levels affect the oceans in a process known as ocean acidification. When CO2 is absorbed by seawater, it reacts to form carbonic acid, lowering the pH of the water. This change in ocean chemistry has detrimental effects on marine life, particularly organisms with calcium carbonate structures, such as coral reefs and shellfish, impacting biodiversity and food webs.

In contrast, the other options present scenarios that are either beneficial or

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