Common cactus could be used to clean water

(PhysOrg.com) -- Access to clean drinking water is lacking in many parts of the world but most technologies to clean water to make it fit for drinking are expensive and hard to maintain. Now researchers propose a cactus common ...

Ohio outlaws ubiquitous pear trees

Ohio this year has banned the sale of Callery pear trees that are crowding out native wild plants in many forests across the country.

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