Why is it not possible to be a carrier of Huntington’s disease?

Huntington’s is a dominant disease.

Explanation:

It is not possible to be a carrier of an autosomal dominant disease because if you possess just one mutated allele you will be affected by the disease. It is only possible to be a carrier of recessive diseases. Huntington’s is, therefore, a dominant disease.

this is because of the way the gene that causes HD is inherited, what is called dominant inheritance. you either have it or you don't, you cannot be a carrier.

it restores trees to areas where they once grew.

i am going to guess that it is co2.