Answer:
Following are the three main reasons why indoor air pollution has become a greater concern in developed countries;
- Indoor air pollution is the cause for several diseases in children and in adults. For example pulmonary disease, lung diseases, tuberculosis and etc.
- Indoor air pollution is also increasing due to the use of older technologies being used in the households for example smoke from chimneys and old stoves that have worn out.
- There is not enough budget and awareness of indoor air pollution and neither are efficient solutions provided to cater to this pressing issue.
This consists of the movement of ideas from one point of origin over a large span of time. This has to include the complete absorption of ideas into society, not just partially.
To learn more about this:
https://study.com/academy/lesson/diffusion-of-innovation-theory-history-examples.html
Hope I helped!
B: Press the clutch then take out the gear
