I too would find it impossible to believe if it were not for all of the evidence worldwide. There is no other theory that so completely explains so many of the unique biologic, geologic and stellar features found by modern man.
Maybe a 6-part hour long video could help folks understand who have no time to read a free online book less than 500 pages.
Videos Fountains of the Deep, Flood of Noah by Pastor Kevin Lea of Port Orchard, OR
http://www.youtube.com/user/CalvaryChurchPO#p/c/11/XXQKSv5o_Po
Incidentally, Pastor Kevin Lea carries quite a bit more credibility than most pastors - he obtained a degree in Nuclear Physics prior to becoming a pastor.
The multi-part video on Earthquakes is a real eye-opener too if you’d like to understand where true climate change future is headed. Not that I like to be the bearer of bad news but I’d rather folks be informed as much as possible.
I have listened to the presentations of a couple of flood geologists and, frankly, they are spouting nonsense. Structural geology with its ties to plate tectonics gives a better understanding of the folds, faults, plutons, volcanos, etc. It also supports the age analysis radiometric dating gives us. The proof is in the use of this understanding in finding and exploiting oil, coal, gas and mineral deposits. In other words, it works.