nuclear winter

Their attempts to survive after the attack make for harrowing viewing, with society breaking down as nuclear winter sets in.

Today, with nuclear arsenals vastly larger and more powerful, scientists know that a nuclear exchange would cause “nuclear winter.”

The second half of the film is particularly bleak, illustrating the effects of nuclear winter as Jackson’s handheld camera documents people feasting on rats and survivors struggling in a hopeless, barren world.

A constellation of new worries appeared alongside thermonuclear fallout: synthetic chemicals, global overpopulation, genetically modified pathogens, "ultra-intelligent" machines and the newly-discovered “nuclear winter” scenario.

Can you elaborate on the connection between the efforts to discredit Sagan's discoveries about nuclear winter in the 1980s and climate change denialism today?