This has been making the rounds. Climate change, 1975:
There are ominous signs that the earth's weather patterns have begun to change dramatically and that these changes may portend a drastic decline in food production --with serious implications for just about every nation on earth.snip
The evidence in support of these predictions has now begun to accumulate so massively that meteorologists are hard-pressed to keep up with it. In England, farmers have seen their growing season decline by about two weeks since 1950, with a resultant over-all loss in grain production estimated at up to 100,000 tons annually.
snip
Climatologists are pessimistic that political leaders will take any positive action to compensate for the climatic change, or even to allay its effects. . .The longer the planners delay, the more difficult will they find it to cope with climatic change once the results become grim reality.
And as everyone knows, the industrialized nations failed to act, and we all starved to death.