Ample evidence now exists to show that worldwide environmental changes are occurring; one example is

Question

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The widespread occurrence of invasive species is a clear example of how worldwide environmental changes are occurring. Invasive species can cause significant ecological and economic harm, and their spread is often linked to human activities such as international trade and transportation.

The other choices are not accurate examples of worldwide environmental changes. Increased NPP in aquatic ecosystems is not a widespread phenomenon and is not necessarily indicative of global environmental changes. The decline in atmospheric carbon dioxide concentrations is actually contrary to what is happening, as CO2 levels are steadily increasing due to human activities. Finally, while there may be some efforts to expand forested land, deforestation is still a major environmental issue worldwide.

Ample Evidence Now Exists to Show That Worldwide Environmental Changes