>1. Food contains too many genetically modified elements. >When these elements got into the cockroaches with food >wastes, insects died off.

They can adapt so quickly to poisons that it seems unlikely.

>2. Modern plastic constructional materials and fabrics are >unfavorable for living creatures.

So why do we still have them in Europe?

>3. High frequency mobile communication is to be blamed for >cockroaches’ disappearance.

All studies about high frequency showed no effect on humans, but I'll admit you can't conclude anything about cockroaches.

But why do we still have them in Europe?

>4. The ozone layer disturbance changed their biorhythm.

What?

What about a natural predator?