"Dr Schnieider was warning of the dangers of global cooling" He wrote a paper speculating that the effects of aerosols would be greater than that of global warming. His was a minority view and he was wrong.
"By the year 2000 the United Kingdom will be simply a small group of impoverished islands, inhabited by some 70 million hungry people"
Firstly, Ehrlich is a biologist, not a climatologist. Secondly, he was talking about overpopulation, not climate change.
"Entire nations could be wiped off the face of the earth by rising sea levels if global warming is not reversed by the year 2000"
But that's a prediction about the future, not now. Global warming wasn't reverse by the year 2000 and Bangladesh in particular is going to face a lot of difficultly this century.
"Amid predictions that by 2010 the world will need to cope with as many as 50 million people escaping the effects of creeping environmental deterioration,
"let's throw in our favorite leader of the global warming movement, Al Gore" Al Gore is a politician. A politician is only as reliable as the information he gets and has no particular expertise. "The polar ice caps have actually INCREASED since then, significantly" Nope http://earthobservatory.nasa.g... There is a lot of variability, but the trends are pretty apparent and the lowest extent was in 2012.
Here the Washington post have a visual of the same thing: http://www.washingtonpost.com/... . Again there is variability but the trends are pretty obvious. Nothing to justify saying it would be clear (as far as I can see) by 2013, but the trend is still there.
Edit: Same post but with the formatting fixed.