It's Arbor Day! One of the greenest things you can do to help the planet is to plant a tree. The National Arbor Day Foundation wants to make it easy for you to help the environment and beautify your yard. When you sign up for a six-month membership ($10), the nonprofit will send you 10 free trees to plant. You can also choose to send your free trees to a threatened rain forest or to one of the nation's national parks instead. To learn more, visit arborday.org.

When buying canned tuna, there are no standards for certified organic, so look for brands that use sustainable methods for capture, like pole and line fishing. These types of fishing are laborious, but they prevent other animals like sea turtles from being caught. These methods also capture smaller tuna, which naturally have less mercury than larger ones, making it a healthier choice.

If you're welcoming a newborn baby into your home, one thing you can do to create a healthy home environment is to skip the wall-to-wall carpeting in his nursery. Synthetic carpet fibers use chemical glues to adhere to the floor. Plus, the fibers can attract dirt, lead and other toxins in addition to mold, dust mites and allergens. Go with an all-natural hardwood or sustainable flooring material like cork. Add natural-fiber area rugs, which can be easily removed for cleaning when needed, or look for modular carpet tiles, which peel right up and can be washed in the sink.