Question

select the correct answer. which of the following phenomenons would be considered an observable indication of global warming? a. the increased use of automobiles in the 20th century b. deforestation in the pacific northwest of the united states c. rising sea levels recorded due to melting glaciers d. an increase in recycling of consumer waste products

Explanation:

• Option A: Increased automobile use is a cause of global warming (emitting greenhouse gases), not an observable indication of the warming itself.
• Option B: Deforestation is a human activity that contributes to global warming (reducing carbon sequestration), not a direct observable effect of global warming.
• Option C: Global warming leads to higher temperatures, causing glaciers to melt. Melting glaciers add water to the oceans, resulting in rising sea levels, which is a direct observable indication of global warming's impact.
• Option D: Increased recycling is an environmental conservation effort, not related to the observable effects of global warming.

Answer:

C. rising sea levels recorded due to melting glaciers