If there had been a 'vapour canopy' what do the you think the relative humidity would been and what affect would that have had on evaporation?
Im not saying I agree with the "canopy theory". The dew tho I do
. Im not sure how it worked but we still get dew today without a canopy.
Here is what CMI says about it:
Though he says that there may well have been a canopy of some sort with water vapor, any attempt to put enough water up there for 40 days and nights of rain ends up with a surface temperature which will ‘cook’ all life.
The HE is Hovind. This is an article that refutes or disagrees with a lot of what Hovind teaches:
Maintaining Creationist Integrity (response to Kent Hovind) - creation.com
The "canopy theory" is mentioned in the article.