How often you should wash your hair in a cold climate depends on your hair's natural greasiness and how comfortable you are with it. You should wash it whenever you feel like it is too greasy.
Freezing cold climate for example the snowy hair has long and fluffy hair to stay warm in the cold brutal winters
Hollow hair and fat
You can (and should) bathe and wash your hair when you have a cold. Just make sure you dry your hair completely before going out in cold weather.
Yes they have sharp claws to climb trees with and thick fur to withstand the cold climate
Never, it ruins your hair and kills it.
1. your hair gets frizzy 2. air is stuffy 3. you can see condensation on cold objects
You should wash your hair every other day or less if the hair is thinning.
Twice a month :)
Everyday.
In order to have shiny hair you should use condintioner or when showering turn the water to cold.
Most sources recommend that people should wash their hair daily or every 2 days. This is usually because if hair is not washed this often it can begin to look oily or greasy.
If you are straitening your hair but do not want to damage it, then you should use special protention products. Often you'll find specific shampoos dedicated to hair that is often heated (via straitener or blow-dryer), personally I would recomend Tresemme. However you should not straiten your hair too often.