What is being challenged is why you think old rubbish quotes from 1970 are somehow relevant to the discussion.
They are relevant because just like in the 70's, quotes from scientists as recently as 2010 are now rubbish quotes.
Eventually the quotes from scientists today will be "rubbish quotes" in the future because these guys are wrong all the time.
Speaking of quotes, the following quote by Sarah Palin was considered "rubbish" back in 2008 by liberals (bold my emphases):
"After the Russian army invaded the nation of Georgia, Senator Obama's reaction was one of indecision and moral equivalence – the kind of response that would only encourage Russia's Putin to invade Ukraine next," - Sarah Palin - Reno, Nevada on October 21, 2008.
Now, let's compare Sarah Palin's quote from 2008 with a quote from Al Gore in 2008:
" Entire north polar ice cap will be gone in 5 years” - Al Gore, 2008
Um.....who's quote was "rubbish", and who's quote was spot on?