Identifying Rhetorical Strategies in Activism

Read the following excerpt from a speech by an environmental activist. Identify the rhetorical strategy primarily employed by the speaker in the highlighted passage:

"In the face of our planet's urgency, we stand at a crossroads. We can no longer afford the luxury of indifference. Instead, let us champion change as our solemn duty to future generations. The flames of climate change consume not only forests, but they threaten the very essence of life as we know it. It is not just an inconvenience, it is a clarion call to action!"

The passage discusses the urgency of climate action while appealing to the audience's sense of responsibility and emotional urgency. Considering this context, which rhetorical strategy is most clearly at work?