Question

Which statement best explains how the global changes in the case study could impact humans?

1) More greenhouse gases will accumulate in the atmosphere.
2) Carbon-rich water flows in ocean currents to colder parts of the globe.
3) Acidic water harms aquatic ecosystems that support fish.
4) There is decreased coral bleaching from the acidic waters.

Answer 1

The most impactful global change on humans would be acidic water harming aquatic ecosystems, affecting food sources and economic activities reliant on these ecosystems, with rising sea levels posing additional threats to coastal communities.

Step-by-step explanation:

The statement that best explains how the global changes in the case study could impact humans is that acidic water harms aquatic ecosystems that support fish. The absorption of increased levels of carbon dioxide (CO2) by the oceans is leading to ocean acidification. This change in pH can disrupt marine food webs, adversely affecting species such as corals and fish, which in turn could impact human food sources and economic activities dependent on these ecosystems.

Rising global temperatures due to the greenhouse effect and subsequent climate change result in higher ocean temperatures, which can also trigger shifts in marine populations, affecting biodiversity and potentially exacerbating the issue of food security for humans. Moreover, melting glaciers and ice caps contribute to rising sea levels, which threaten coastal communities and lead to habitat loss for both humans and wildlife. This is a critical consideration as many human populations live in coastal regions.