Traditional bleached coffee filters expose you to harmful chemical by-products, such as the infamous dioxins - carcinogenic chlorinated hydrocarbons - which are persistent organic pollutants. This means they can move within the ecosystem, and thus from filter to coffee, exposing a coffee drinker to these dangerous chemical pollutants which can bio-accumulate (meaning small amounts can build up to dangerous levels). EMMA unbleached coffee filters provide coffee-drinkers with a safe alternative to bleached filters, reducing the user's exposure to these cancer-causing chemicals. Large and sturdy, there is no compromise in quality, just the peace-of-mind that dioxins are not blended in your morning brew.