What we know now

In the 1970s, some media outlets speculated that the Earth might be entering a new ice age due to short-term cooling trends and aerosol emissions. However, climate science has since evolved, and the overwhelming consensus now shows that human-induced global warming—primarily caused by greenhouse gas emissions—is the dominant trend. Evidence from NASA and the IPCC confirms that the current warming rate is unprecedented over millennia and directly linked to human activity.