Window Farms - argument that growing even just some of your own food is the best thing you can do for the environment -> how you can do it w/o dirt & in an apt. Talk on TED: http://www.ted.com/talks/britta_riley_a_garden_in_my_apartment.html?utm_source=newsletter_weekly_2011-11-29
Make your own hanging tomato plant/garden by drilling a hole in a plastic container, planting the tomato upside down, then hanging. Bonus: can plant something else (eg, basil) in the top. Idea from Marshalllee.net.