*[https://www.aei.org/carpe-diem/18-spectacularly-wrong-predictions-made-around-the-time-of-first-earth-day-in-1970-expect-more-this-year-3/ AEI - 18 Spectacularly Wrong Predictions: Earth Day, 1970] | *[https://www.aei.org/carpe-diem/18-spectacularly-wrong-predictions-made-around-the-time-of-first-earth-day-in-1970-expect-more-this-year-3/ AEI - 18 Spectacularly Wrong Predictions: Earth Day, 1970] |