Yahoo questions...question, interesting question.

This might me an interesting one for hot air balloon makers to follow

Open Question: If you could design a hot air balloon...?
<http://answers.yahoo.ca/question/index?qid=20061105130218AAcIH8y>

and you wanted it to float really well...what would you make it out of that
is scientifically possible?Any materials can be used and cost is not a
factor. It needs to float for a long time. I already know that hot air can
make it float, ...
Yahoo! Answers: Physics -
http://answers.yahoo.ca/dir/?link=list&sid=396545211
<http://answers.yahoo.ca/dir/?link=list&sid=396545211>