North American bird population is declining. The decline is accelerating in regions associated with intensive agriculture.

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Co-chief executives Jennifer Sundberg (left) and Pippa Begg

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In some cases, alternative gelling agents might provide faster results. Researchers observed that bacterial cellulose and another bacterial polysaccharide, Eladium, allow a 50 percent increased growth rate for various bacteria and yeasts (as compared to their growth on agar), including higher biomass yields or faster detectable biofilm formation. However, both substances are still not as cheap and readily available as agar.