Charmin, Kleenex Cottonelle, Quilted Northern and Scott are among the toilet papers and tissues that do the most harm to forests and the environment, according to a new report by Greenpeace.

The non-profit research group evaluated dozens of brands of toilet paper, facial tissue, paper, towels and napkins according to three criteria:

1) How much recycled content they contained – using 100% recycled content helps protect forests because it significantly reduces the demand for trees, especially trees coming from native forests.

2) How much of that was post-consumer waste – to get the top ranking, at least 50% post-consumer waste needed to be used in manufacturing the product.

3) How the paper was bleached – the top-ranked products are not bleached using chlorine, which can create the toxic byproduct dioxin.

According to Greenpeace, Americans could save more than 400,000 trees if each family bought a roll of recycled toilet paper—just once.

The group has produced a pocket guide you can use when you shop to buy the most eco-friendly option.

Brands that ranked high on the Greenpeace list include:

* Green Forest

* 365 Whole Planet (available at Whole Foods)

* CVS Earth Essentials

* Seventh Generation

* Trader Joe’s

* Cascades

Of course, when it comes to napkins and towels, use cloth, and avoid the paper debate altogether.