The former kills only the adult fleas and the latter also kills the larvae and eggs. Fleas can become immune to this type of chemical. This is the worst summer ever for fleas with all the heat and humidity.
I'm more into natural remedies. I did a hub "How to Debug Your Kitty" and I've solved the flea problem without a bunch of chemicals that might harm the animal or even humans. The cat still hates getting a bath mostly every day.
He'll run and hide when he hears the water running in the sink.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.