What happened to the predicted ice age in the 70's?

I remember and have since been reminded that during the mid to late 70's the world was in panic about the coming ice age. What happened there? How did the environmental scientists get it so wrong? Also, through out the 80's and 90's the big panic was about the whole in the Ozone layer, but now it’s... show more I remember and have since been reminded that during the mid to late 70's the world was in panic about the coming ice age. What happened there? How did the environmental scientists get it so wrong?

Also, through out the 80's and 90's the big panic was about the whole in the Ozone layer, but now it’s never mentioned. Is it still there? Has it closed itself?

Finally, since CO2 and Global Warming is the big panic for this decade. What will be the huge issue and panic in the next 20 years when CO2 and Global Warming is just a distant memory?
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