As we round the corner into 2013, we’re more excited than ever about green tech — and so are Silicon Valley investors and entrepreneurs.

Years and months past saw some dimming of the enthusiasm around green tech and clean tech — think Solyndra’s devastating 2011 shutdown, A123′s recalls, or the numerous horror stories of consumers accidentally “bricking” spendy electric cars like Tesla’s Roadster or the Fisker Karma.

But with smart business ideas, ample venture capital, important partnerships, and better predictions about the future, 2012′s crop of innovations seem better suited to wear well over the next few years. Here are 10 of our favorite green tech stories from 2012 in ascending order. We hope to bring you more and better eco-forward tech news in 2013.

Greener packaging

It bothers all of us every time we unbox a new tech toy: Why all the plastic and Styrofoam for one slender little phone or laptop? At least one company, logistics giant PCH International, is focusing on fixing that problem, starting with Silicon Valley’s gadget packaging.

The story: “The company’s Sustainable Packaging Design Centre of Excellence will include a material library and a structural design engineering and quality test lab, and it’ll be based in Shenzhen, China. The company will also open a showroom and material library in San Francisco early in 2013, placing its services in closer reach of Silicon Valley companies — those that still make hardware products, that is, rather than Facebook games or iPhone apps.”

Greener gatherings

With conscientious young folks more concerned about their own impact on the environment, more large-scale music festivals and similar-in-scope gatherings, such as Coachella and Burning Man and far beyond, are focusing on their ecological footprint.

The story: “For three days in August, 60,000-plus hipsters each day pour into a handful of meadows, as thick and viscous as the fog itself. … The air surges with amplified guitar fuzz and obscenities from the mouths of performers, and you can almost feel the ground shake from the trampling feet of a herd of humanity. Then, when the three-day rock orgy is over, Golden Gate Park is miraculously returned to its original state. Pristine. Clean. … As though nothing had ever happened.”

LED revolution

LED lights are getting on our nerves as they’re being hastily incorporated into holiday decorations, but as everyday substitutes for incandescent bulbs, they’re doing great things for the planet.

The story: “Just in time for Earth Day, Dutch electronics company Philips is unveiling a new super energy-efficient light bulb today with a shelf life that should last about 25 years. The catch? It costs about $60, but Philips is said to have forged deals with some stores to bring that cost down to about $20.”

Record-breaking car battery

Electric cars have long been the domain of short-range enthusiasts, but a new battery developer brought fresh hope to an exciting industry.

The story: “‘We have built 400 watt-per-kilogram batteries, which have been considered the holy grail of electric cars,’ said Envia’s chief executive Atul Kapadia said in an interview with VentureBeat, ‘This is a milestone that many car companies have wanted to reach.”‘

Tata Nano

The Smart Car and its ilk — tiny, highly efficient autos — are starting to pop up in urban areas in the U.S., and this super-cheap model from overseas finally announced its American debut in 2012.

The story: “Tata Nano’s top speed of 65 mph and its cramped interior definitely will not appeal to all in spite of the success of the Austin Mini, Smart Cars, and the Fiat 500. Nano is two feet shorter than the Mini and decidedly bare-bones inside. Currently, the heater is optional in the base model, and it has no options for A/C or heated seats.”

The war for data-center efficiency

The companies that control the Internet are in a sort of arms face for efficiency — not only so they can toot their horns to consumers about how green they are, but also so they can cut their own costs and increase their bottom line profits. But this is one case where corporate money-chasing is actually a win-win for the companies and the planet.

The story: “It’s a bit naïve, a bit ‘kumbaya,’ to expect two titans viciously warring for revenue to come to a round table and collaborate on issues like innovative mobile tech and greener data centers. But somehow, without striking a blow, Facebook has managed to give Google a black eye. Perhaps, if only for PR purposes, it’s time for Google to get its ‘kumbaya’ back.”

Research makes the world go ’round

Some of the most exciting advances in green tech this year happened on the formative research front, where scientists explored turning algae into gasoline, making batteries from garbage, producing fuel from seaweed and E. coli, or even making cheap solar panels out of rusted metal.

The story: “For example, cuprous oxide (Cu2O) is a highly abundant but hard-to-dope semiconductor. ‘It’s time we put bad materials to good use,’ said physicist Alex Zettl. ‘Our technology allows us to sidestep the difficulty in chemically tailoring many earth abundant, non-toxic semiconductors and instead tailor these materials simply by applying an electric field.’”

SolarCity’s IPO

In the wake of several high-profile, taxpayer-subsidized failures, SolarCity’s initial public offering was a welcome balm to a bruised industry.

The story: “Trading started at $9.25 and by midday surpassed $12. … The stock took off. This is partly attributable to SolarCity chairman Elon Musk, along with fellow board member Draper Fisher Jurveston, indicating their intent to buy a significant portion of the shares.”

Greener homes with Nest

One of the year’s best green tech stories didn’t take place in the chilly halls of a massive data center or the production lines of a hybrid car manufacturer. Nest is the greening gadget for consumers’ homes, and in spite of significant obstacles, it came through 2012 with flying colors.

The story: “The new Nest thermostat is 20 percent thinner. Under the hood, the Nest now has 10 wires to support more systems — the new unit adds support for two-stage cooling, three-stage heating, heat pump emergency heating, and whole home humidifier and dehumidifiers. As you can see in the images below, Nest Labs has also tweaked the wire orientation to be circular, which the company says will make it easier to install.”

Tesla’s turning point

The famous Silicon Valley electric car maker finally hit a crucial turning point in 2012. Not only did its Model S win some critical acclaim from Motor Trend, but the company made perhaps its most significant announcement to date when it told us last month it would be ready for mass production in 2013.

The story: “Tesla is confident it can reach a production rate of 400 cars per week next month. In other words, in 30 days it will be producing more cars in one week than it did in all of the last quarter. That rapid ramp-up is key to the company’s success. In three more months, Tesla will deliver another quarterly report, and then we’ll learn whether its optimism is justified or just an empty promise.”

Image credits: BONNINSTUDIO/Shutterstock, calonda/Flickr, Jolie O’Dell/VentureBeat, Jolie O’Dell/Flickr, Zettl Research Group, jurvetson/Flickr

SANTA CLARA, Calif. — The U.S. has an estimated 48 million birdwatchers, but 74 percent can’t identify more than 20 birds.

I’d fall in that category: I could point out a red-tailed hawk, a turkey vulture, a crow, and … a bunch of little brown birds. But with 900+ species in the country, I know I’m missing a lot.

Fortunately, there’s an app for that.

Birdeez is an iPhone app that makes it “ridiculously easy,” in the words of cofounder Jeff Simeon, to identify birds and then share your sightings on Twitter. I can only imagine that if the geeky Jack Black character in “The Big Year” had this app, he’d have powered to the top of the rankings much faster than that annoying Owen Wilson character.

It’s Simeon who’s the source of the stats above, and when he told me about his company in a recent email, his conviction was a bit contagious. “People of all ages are suffering from nature deficit disorder at the same time that the environment needs a lot of attention,” Simeon said. “Our goal with our products is to use mobile technology to educate and invigorate interest in and about the environment.

“Almost everyone has seen a cool looking or beautiful bird at some point and wondered what kind of bird it is. But for many people, including my wife, current tools are too confusing or cumbersome.”

“What I would love to see is some more automation. Think of Shazam for birds. The right business model here is not ads, it’s around figuring out what people will pay for in a freemium model,” said Jason Krikorian, partner at DCM, at the DEMO Conference in Santa Clara, Calif.

Birdeez is still pending approval from the Apple iTunes App Store. In the meantime, the company is making its debut at DEMO Fall 2012 this week here in Silicon Valley.

“Do you remember when every tweet used to come with feathers? We gave them feathers again,” said Simeon at the DEMO Conference in Santa Clara, Calif.

Birdeez takes you through the identification process via a few simple steps (see screenshots below). Figure out its rough category, select a size and color, and then narrow it down to matching species. Once you’ve found a match, you can read a detailed description and behavioral information. If you press the “spot it” button — the high tech version of writing down the bird in your life list — Birdeez will save the time and place of your sighting, and optionally let you tweet it.

EcoLek got started in 2011 when Simeon and cofounders  Patrick Toerner and Thomas Kuo won a business plan competition at UC Santa Barbara, where Simeon was pursuing a graduate degree in environmental science. Other than the prize money, the company has not raised any outside funding.

Simeon is not just hoping to get more people interested in birdwatching and nature (something that wouldn’t be such a bad idea, given that the average age of a birdwatcher is 50 and the majority of people who claim the hobby are white). By collecting data from Birdeez users, EcoLek could also contribute to research on bird populations.

“Collecting sightings can crowdsource something much larger than the individual data. Also, bird watching has a huge social element in person, so we want to take that sharing online as well,” Simeon says.

So the next time you see a bird, you might just want to, well, tweet about it.

Top photo: Left to right, Thomas Kuo, Jeff Simeon, and Patrick Toerner. Photo and screenshots courtesy EcoLek.

EcoLek is one of more than 75 companies chosen by VentureBeat to launch at the DEMO Fall 2012 event taking place this week in Silicon Valley. After we make our selections, the chosen companies pay a fee to present. Our coverage of them remains objective.

Demo image via Meghan Kelly/VentureBeat