Under a tradable permits treaty where the total number of permits is 60, if country L is unaffected by global warming, country L should still agree to the treaty if it is given at least _______ permits. Why?

Under a tradable permits treaty where the total number of permits is 60, if country L is unaffected by global warming, country L should still agree to the treaty if it is given at least _______ permits. Why?

Under a tradable permits treaty where the total number of permits is 60, if country L is unaffected by global warming, country L should still agree to the treaty if it is given at least _______ permits. Why?
Under a tradable permits treaty where the total number of permits is 60, if country L is unaffected by global warming, country L should still agree to the treaty if it is given at least _______ permits. Why?