While there are a variety of eco-friendly litters on the market, World’s Best Cat Litter tries really hard to hold true to its name. Traditionally, litters are made of non-biodegradable clay and the dust can cause allergies and asthma for humans and cats. World’s Best Cat Litter created pellets made of sustainable, chemical-free compressed corn that trap odor and form tight clumps on contact, allowing you to use less litter. Unlike clay litter that ends up in a landfill, World’s Best Cat Litter is sewer and septic safe, so you can scoop and flush! With a key mission advocating for cat adoption, they have started a Give Litter initiative by committing to donating up to 3 million pounds of cat litter to help support the over 3 million cats that end up in shelters every year.