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Some, but not all, cardboard is treated with wax or laminated. These forms of cardboard are considered to be waterproof.
no
you cant
we need ecofriendly buildings as a model to other buildings to become ecofriendly
Lauren is dumb
The Type of plastic that they use is one way that made it waterproof
ecofriendly
Yes, no emissions.
Um... thicker cardboard? This question is way too vague to answer.
A high fired clay pot is waterproof and a glazed pot is waterproof and both are safe for this purpose.
If you mean India ink, the answer is no. India ink in made with carbon black and is not inherently waterproof. It must be made waterproof the same way other inks are made waterproof, by the addition of certain chemicals and compounds.
physicians formula is available at most drugstores: walmart, cvs, walgreens. Hope this helps! Ecofriendly & everything is a great way to go!