My story today on new federal dietary guidelines urging Americans to lay off processed foods loaded with salt, touched on how difficult it can be to find healthy food options.

How exactly are you supposed to avoid all the fat, sugar and calories if your neighborhood has no full-scale grocery? The Baltimore health department is trying to offer healthier options through its Virtual Supermarket Project, which allows residents to order groceries online from Santoni's Super Market in Highlandtown and pick them up from their local library branch the next day.

Launched last year in two neighborhoods, the program is expanding into two more locations in Cherry Hill and Washington Village, health officials announced yesterday.

If you live in a neighborhood with no full-scale grocery store, you know your only options are corner stores, carryouts and fast food joints.

More than 23 million people in the U.S. live in a neighborhood so devoid of fresh food it's known as a "food desert," according to the USDA.

Last year, First Lady Michelle Obama pledged to combat the problem in her Let's Move campaign, and the USDA studied the issue and created an online tool to help find ways to irrigate these food deserts, if you will. The map-based Food Atlas allows you to search your local community for accessibility to grocery stores, levels of physical activity and overall health.

But many advocates say more innovative programs are needed to stamp out food deserts and bring fresh food to neighborhoods that so desperately need it. Do you have any ideas?