These 12 works of art, from 16-foot towers and intricate pavilions to edible books and busts of Greek gods, are made from an unexpected material: sugar.

The Detox Towers concept uses a dual algae bio-filter and synthetic membrane system to cleanse the air of pollutants, decreasing greenhouse gas levels.

From an aquatic plant that sucks tadpoles into 'bladder traps' to pitcher plants that eat mice or survive on poo, these 7 carnivorous plants are truly amazing.

These 12 jungle dwellings - from tiny tree houses to entire communities - are uniquely suited for their harsh untamed environments.

The best eco-friendly packaging for gifts and products is not just highly efficient and made of recycled or natural materials, but presentable, too.

These three ideas, from a simple sand filter to water vapor towers to alter the climate, aim to help solve Africa's water crisis.

With a little imagination, the pallet sitting by the curb behind your local home improvement store could be your new bed platform, coffee table or accent wall.

Futuristic or folly? Massive megastructures for healthy high-density housing that capture or desalinate water, produce renewable energy and create micro-climates!

These 12 designs and inventions take inspiration from the sea and the marine life it contains, from a robot squid to an earthquake-resistant man-made island.

The 'Collect the Rain' skyscraper has a concave roof, an exterior sheath of curving gutters and a funnel-shaped core to collect as much rainwater as possible.

For mere pocket change you can stay in a treehouse in the Philippines, enjoy a green getaway in Hawaii or spend a few eco-friendly nights in 12 other places.

Some cost millions and others are cobbled together from reclaimed buses, planes and trains, proving that living in a houseboat can be done on any budget.

Books that are out-of-date and just plain unwanted are given value as decorative and functional objects in the home including lamps, sofas, desks and planters.

A zero-waste pop-up restaurant, a chic and colorful guest house and a cool new concept for Boy Scout camp cabins are 3 new examples of shipping container reuse.

Transform your empty beer, wine and liquor bottles into lamps, bird feeders, shelving units, wind chimes - even a solar water heater or a house.

These 12 concepts for cities, multi-use skyscrapers, theme parks and more look out of this world - but surprisingly, a few will be built sooner than you think.

Green travel doesn't always mean roughing it. These 12 luxurious eco resorts offer all the perks of a pampering getaway in an environmentally responsible manner.

The world's largest landfill - located on the notoriously smelly Staten Island - is being rehabbed into an incredible 2,200-acre public park.

Noodles in Thailand, falafel in Israel, tacos in Mexico, crab in Singapore and crepes in Paris - street food in these 10 cities is cheap, quick & oh-so-tasty.

At these 13 eco resorts, you'll get up close and personal with nature in treetop pods, floating lodges, huts on stilts and primitive grassy shelters.