Not really. You don’t need to register / sign up with GREEN BUSINESS PAGES to search and access its database. You can avail this crucial service as a Guest visitor too.
However, signing up an account gives you several additional features like bookmarking a listing, publishing a List of your chosen business listings (as a publicly visible or private collection), a dedicated Dashboard with your profile photo, cover picture, an easily accessible collection of all your favourites, all reviews made by you, listings submitted by you, Lists, subscriptions and invoices. You can also print and pay your pending invoices from your User Dashboard.