Hjælp til fejlsætninger

Hej, er der en venlig sjæl, som kunne have lyst til at hjælpe mig med disse fejlsætninger, eller blot nogle af dem? 

I hver af de nedstående sætninger er en grammatisk fejl understreget. Jeg skal her både rette og forklare rettelserne med  udgangspunkt i sætningerne. Jeg har dog virkelig svært ved at rette fejlene, så jeg vil sætte pris på lidt hjælp. 

- Open defecation has been combatting because it results in fatal diseases. (kan det være en stavefejl, da ordet staves "combating" ? ) 
- In Bangladesh, sanitation has throughout the past ten years improved drastically.
- The composting toilet is an environmental sound alternative to water-flush toilets all over the world.
- The business of composting toilets are also booming in the UK, primarily due to a growing demand for outdoor toilets.
- It is rumoured that psychologist Larry Rosen is about to give a lecture in Copenhagen two years from now.
- In an article by Rosen is the impact of too much use of technology discussed.
- As a rule children are grabbing their iGadgets if they want entertainment.
- Studys show that the average child in the USA spends seven hours every day on various media.
- Some people blame television, which impact increases year after year.
- It is highly probable that more people will be treated of psychologists for their addiction to gadgets.

Tak på forhånd!