During the research for the GreenHeart line of phones, which are eco friendly and made from recycled materials, Sony Ericsson made some discovers on touch screen handsets. Phones, such as the Xperia X1 which feature a touch screen are not as good for the environment. The screen on the Xperia is 3 inches, which is about the average for touchscreen handsets, can not be made as easily from recycled materials. Handsets with a touch screen rely heavily on glass for the screen compared to smaller handsets, which can use recycled plastic.

A smartphone, or touch screen phone, can give out 25/30kgs of CO2 emissions during it’s usage. Where as a green phone, will omit around 18kgs. This is due to the touch screen and also based on the fact, that most touch screen or smartphones have more than just calling and texting features. Features such as Wi-Fi or GPS can use up more battery life than a call, meaning eco friendly batteries can’t be used in the handsets.

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The eco friendly handsets from Sony Ericsson, dubbed the GreenHeart series, will see the C901 and Naite as the first handsets in the series. When we previously reported on the handsets no price had been confirmed. Members of Sony Ericsson’s team of green mobile phone developers have announced the price during a live web cast yesterday. The GreenHeart C901 is set at 359 Euros in Germany, while the Naite will be 159 Euros. It’s also been revealed, that the handsets will feature a carbon footprint calculator and WalkMate, a pedometer on the handset.

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GreenHeart C901 and Naite respectively

If you didn’t catch the webcast for Sony Ericsson’s eco friendly phones, don’t worry, we have the news right here. Sony Ericsson have announced the launch of the first two handsets from the GreenHeart line.

First up is the GreenHeart C901, similar to the original C901, but enviromentally friendly. Likewise, the GreenHeart C901, features a 5 megapixel camera with Xenon flash and smile shutter. The screen follows the regular resolution of 240 x 320 on a 2.2 inch display. Also featured on the phone is bluetooth connectivity and M2 storage support. The C901 also features Google Maps, but uses cell station triangulation as it doesn’t feature GPS.

The second phone, the GreenHeart Naite is of similar spec, but features a 2 megapixel camera instead. Both phones are planned for release in Q2, but there’s currently no information on pricing or country availability.

Remember the environmentally friendly Sony Ericsson handset we reported on last year? Well tomorrow will see Sony Ericsson unveil the line up of GreenHeart handsets. The announcement will be available to view as a webcast on the Sony Ericsson website and will start at 1PM GMT. You can keep track, as well as link up to the webcast, from here.

The eco friendly phones are made from bio plastic housing with recycled keyboards.