Rhetorical question?

Today's Gospel ends with the Lord's striking question, "When the Son of Man comes again, will he find faith on the earth?" The homily for today's Mass at St. Edward the Confessor called this a "rhetorical question." I don't think it's rhetorical at all. In fact, the urgency of this Gospel came to mind when Sr. Helena sent me a link to an article in Rolling Stone (she's a longtime subscriber!) in which a really respected scientist is not predicting distant doom for the planet, but indicates that catastrophe is just around the corner. Like, fifteen or so years around the corner, for the starting volley. According to Lovelock, the human race is not in for a very promising spell. ("Head for the hills!" is closer to his message.) If he is even close to being right, that means we have about a hundred years, give or take some decades, to make sure that there will be "faith on the earth" no matter how the reshaping of habitable land takes place.
Of course, it shouldn't take the threat of imminent destruction to motivate us to proclaim Christ, but... what if Lovelock is right? Would the Son of Man find faith on the earth?