When the same folks spew the same fake news when it is so easily debunked, you can see why any rational person would be skeptical of either their intelligence or motivation for lying so blatantly.
https://www.snopes.com/fact-check/time-magazine-cover-global-cooling/
https://www.snopes.com/fact-check/the-coming-ice-age/
As noted by Time itself in 2013, the 2006 image on the right is an authentic cover, but the 1977 image is a doctored version of an 9 April 2007 issue which actually featured an article titled “The Global Warming Survival Guide”: