TUCSON, Ariz. — Every year 500 billion to 1 trillion plastic bags are used worldwide and every year these bags turn into litter and polution. Fortunately, many stores, such as Albertsons, Walgreens and Trader Joe's, have started to sell reusable canvas bags.

Instead of using plastic bag after plastic bag to carry home your groceries, take to using canvas bags instead, which can be reused, eliminating plastic bags as sources of non-biodegradable trash.

Go to your usual shopping spots and look around for canvas bags for sale. In most grocery stores the reusable bags can be found near the checkout aisles.

If your favorite store does not sell canvas bags, then check out the Internet to find cheap canvas bags. Sites like reusablebags.com sell resuable canvas and organic hemp bags.

If you can't afford special bags for your groceries, just do your part by reusing the plastic bags you already have or refuse a bag when you don't really need one.