In contrast, even short-term projections involving complex systems—those that reflect interplays of many technical, economic, and environmental factors, and which can be strongly affected by a number of arbitrary decisions such as unexpectedly generous government subsidies or new laws or sudden policy reversals—remain highly uncertain, and even near-term outlooks result in a broad range of possible outcomes. Forecasts for the worldwide adoption of electric passenger cars are an excellent recent example in this category.[8]
