The ultimate in green living is almost here. Think bus shelters, street lamps, and even houses -- all grown from trees. The process of shaping living trees to create objects, referred to as arborsculpture and pooktre, is well known among hobbyists (a simple Web search shows plenty of results for the art form). Now, researchers at Israel's Tel Aviv University are teaming up with eco-living company Plantware to create commercial structures on a larger scale.

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People generally know that substances that are harmless when taken separately in small doses can lead to disorientation, and perhaps uncharacteristic behavior, when mixed. Honey bees, apparently, do not. After all, dabbling is what honey bees do, and it's what we love them for. These little workers are responsible for billions of annual agricultural industry dollars, thanks to their pollination services. But bees haven't been staying on task. They've been acting a little weird lately--leaving their hives and not coming back--and attracting a lot of attention for it.

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Although we still have much progress to make on reducing emissions, new research suggests the situation could be worse.

According to a study by the Desert Research Institute, pollutant levels at the beginning of the 20th century were two to five times higher than current levels of pollution. Researchers attribute the decrease in pollution levels to the advent of more efficient coal-burning technologies, as well as legislation aimed at reducing emissions.

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Dear EarthTalk: My body doesn't tolerate cheese well. Are there dairy-free cheeses that will be easier on my constitution and better for the environment, too? -- Steve Sullivan, Seattle, WA

With some 30 to 50 million Americans suffering from various degrees of lactose intolerance, and an estimated three million of us now eating animal-free (vegan) diets for humane, environmental, and/or health reasons, the production of alternatives to dairy products has started to become big business.

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Like analog TV and Marshall Tucker fans, solar power is a holdover from the Carter administration. Yet, for modern businesses like Google and General Motors, it's a promising alternative energy source. So far, "promising" is as far as it's gotten: the density in data centers and in the typical office complex -- lots of demand in a small area -- turns solar arrays into a pipe dream. At Google HQ, for example, nearly every rooftop is covered with solar panels, and they have plans for more coverage, but the array can only provide for about 30 percent of peak power usage.

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As researchers find new technologies to power the world of the future, the answer may be blowing in the wind.

Across the country, wind-generated power has been showing the potential to be a significant energy generator. Last week, Rock Port, Missouri, became the first city in the United States to generate its electricity entirely through wind-powered technology. Meanwhile, Texas, known for its oil connections, has become the nation's largest producer of wind-powered energy and is investing almost $5 billion in a wind power project.

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In our annual Future of the Environment issue, we take a look at the monumental problems facing our world as we continue into the 21st century, as well as solutions ranging from the audacious to the everyday to, quite literally, save the planet.

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Everyday behavior, things that it's easy to take for granted, have a significant effect on the planet. Some habits are easy to change, but others are more deeply entrenched. And so, despite your good intentions, you're probably wrecking the environment as we speak. See the five ways you're ruining things (and how to turn them around) here.

And check out PopSci's complete coverage of the future of the environment at popsci.com/futurecity.

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Here at Popular Science, we're pretty optimistic about the potential for large-scale technological projects. But sometimes the cutting edge can cut in destructive ways. Join us as we look at five upcoming projects that have the potential to wreak destruction on the environment.

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