The laws of Kashrut

[RationalThought110]

I think of most people who keep Kosher, they assume that fruits and vegetables don't violate the laws.  So I don't most Jews are unaware that lettuce needs to be inspected. 

So how should people buy fruits and vegetables?  Do all fruits and vegetables need to be inspected?

[TorahZionist]

Fruit and vegetables have to be inspected by the consumer.

Here are some guides on how to inspect them:
http://www.oukosher.org/index.php/common/article/2716/
http://www.ok.org/PDF/OK_Veggie_Checking_Guide.pdf