One of history’s greatest (non) scientific blunders has been the false claims of a coming global warming disaster.
Many governments jumped onto the coming global warming disaster fantasy in the late 1990s.
Politicians claimed the "answer" (to the fantasy) was new regulations and new taxes on corporate and private energy use (more tax revenues for them).
Since the late 1990s, there has been no global warming at all -- all five surface and satellite compilations of Earth's average temperature show a flat trend for the past 12 the 18 years.
Conclusion: The government-led global warming predictions in the late 1990s were one of the worst-timed, ill-informed, and self-deluded predictions in history.