Global Warming should be taught in History Class in schools. To be accurate high school, middle school and elementary school teachers should start the lesson with: “Once upon a time there was this thing called Global Warming... it was a long time ago, before you were born...”
i don’t think we had more than 2 days over 90 here in NYC this summer. Maybe one of those ‘typical’ hot muggy August days.
Sentences beginning with the word "though" usually continue in the subordinate clause with a "yet" or "nevertheless" or such, so as to mitigate the statement made in the primary clause.
There's also an "in" missing. I believe your headline should thus begin:
"Though in August there has been approximately an 80% increase in Ice Volume over August 2012..."
and continue with
"...nevertheless, [e.g.] Global Warming is still a threat..."
Of course, it is only the headline of your posting, so I guess that one could overlook a certain degree of confusion.
Regards,