Помогите воткнуть верно слова Most people believe that natural fabrics are

Помогите воткнуть верно слова
Most people believe that natural fabrics are 1).........(good) for the environment than synthetic ones, but this isn't always true.
For example, while it only takes a pound of cotton to make one T-shirt, it takes a 2).........(three) of a pound of pesticides to grow the cotton in the first place!
3)..........(fortunate) all of these chemicals end up as waste, which contaminates' our rivers and soil.
Here are some of the 4).........(differ) options on offer.
Flax grows more 5).........(quick) than cotton and needs fewer chemicals to produce it.
It doesn't take a lot of effort to be naturally 6).........(fashion), so why not give It a try!