The general public naturally has a hard time grappling with this complexity and uncertainty, especially since the changes in climate are occurring over a timetable of decades and centuries, rather than months and years. Moreover, year-to-year and even decade-to-decade natural variations in climate are intermixed with human-induced climate change, making it even more difficult to target damaging behavior.
特别是气候变化的时间周期是几十甚至数百年，而不是几个月或者几年，因此公众自然在理解这种复杂性和不确定性方面遇到很大的困难。 此外，每年甚至每几十年发生的自然气候变化与人类活动引发的气候变化杂糅在一起，进一步加大了确定损害行为的难度。