Question

climate change is an existential threat to human civilization and most life on earth. when did anthropogenic (human - caused) climate change begin?
a. during the first agricultural revolution.
b. during the green revolution.
c. during the industrial revolution.
d. during the renaissance revolution.

Explanation:

Anthropogenic climate change (human - caused climate change) became a significant issue during the industrial revolution (option C). The industrial revolution saw a large - scale increase in the burning of fossil fuels (like coal, later oil and gas) for energy to power factories, machinery, and later transportation. This led to a substantial rise in greenhouse gas emissions (such as carbon dioxide) into the atmosphere. The first agricultural revolution (option A) was more about the transition from hunting - gathering to farming, with relatively low levels of greenhouse gas emissions. The green revolution (option B) was focused on increasing agricultural productivity through new crop varieties and farming techniques, not a major driver of climate - changing emissions. The Renaissance (option D) was a cultural and intellectual movement, not associated with large - scale industrial emissions that drive climate change.

Answer:

C. During the industrial revolution.