The beginning of these predictions in the modern sense, saw a revitalization on [[Earth Day]], in 1970. It began with fears of a [[global cooling]] that slowly, over time, evolved to concerns of [[global warming]] once it became evident that they were incorrect in their initial predictions. | The beginning of these predictions in the modern sense, saw a revitalization on [[Earth Day]], in 1970. It began with fears of a [[global cooling]] that slowly, over time, evolved to concerns of [[global warming]] once it became evident that they were incorrect in their initial predictions. |