In the 1950s the froth flotation technique was adapted for deinking recycled paper.
en.wikipedia.org In keeping with the organisation's eco-friendly philosophy, the magazine is printed on 100 per cent recycled paper, using vegetable, rather than chemical-based, inks.
en.wikipedia.org The recycled variety is its principal form and comes in two series or standards: original, made from 50% post consumer water and recycled paper; and certified, 100% post consumer waste.
en.wikipedia.org These include removing selected species, creating gaps for regeneration of new individuals, recycling nutrients, and dispersing seeds.
en.wikipedia.org This downloadable teaching resource contains green lesson plans, environmentally themed experiments, and green classroom activities on the carbon cycle, saving energy, recycling, and endangered animals.
en.wikipedia.org