Off the coast of Italy, a company has created underwater greenhouses, using the sea to grow plants like basil and strawberries. Read more about it here, see the livestream of the garden here, and check out some books that can help you think of creative ways to live in an environmentally-friendly way.
Aquaponic Gardening: A Step-by-Step Guide to Raising Vegetables and Fish Together by Sylvia Bernstein
The Conscious Kitchen: The New Way to Buy and Cook Food-- to Protect the Earth, Improve Your Health, and Eat Deliciously by Alexandra Zissu
The Locavore's Handbook: The Busy Person's Guide to Eating Local on a Budget by Leda Meredith
Made by Hand: Searching for Meaning in a Throwaway World by Mark Frauenfelder
Made from Scratch: Discovering the Pleasures of a Handmade Life by Jenna Woginrich
The Plundered Planet: Why We Must, and How We Can, Manage Nature for Global Prosperity by Paul Collier
Shift Your Habit: Easy Ways to Save Your Money, Simplify Your Life, and Save the Planet by Elizabeth Rogers and Colleen Howell
Urban Homesteading: Heirloom Skills for Sustainable Living by Rachel Kaplan and Ruby K. Blume