Sony Ericsson released two environmentally-friendly phones and a recycled Bluetooth headset today as part of a new "green" initiative called GreenHeart. One of the phones, the upcoming Naite, may be destined for a US release. (To watch the Webcast announcing the phones, see this GoodCleanTech post.)

The GreenHeart initiative includes setting targets for reducing carbon dioxide emissions by Sony Ericsson's supply chain and reducing the overall carbon-dioxide footprint of Sony Ericsson products through various means.

For instance, they're eliminating paper manuals on their "green" phones, reducing the size of their packaging, using recycled plastics, and using low-power chargers. By 2011, they will volunteer to take back and recycle their used phones wherever they're sold. They're also reducing the use of hazardous materials in manufacturing their phones.

The two new phones are the first fruits of the GreenHeart plan. The Naite, which will come in a model that will work with AT&T's 3G network here in the US, is a mid-range, candybar-style feature phone. It has a 2-megapixel camera, media player, Web browser, Microsoft Exchange e-mail support, Bluetooth, and an FM radio. According to a Sony Ericsson chat transcript, the phone will cost around 159 euros ($222) before subsidy.

GreenHeart's flagship product, the C901, will not be released in the US, though a Sony Ericsson Web page hints at a "C901a" which could be the US model. That phone has a 5-megapixel camera with xenon flash along with all of the Naite's other features.

You can check out the full specs for both phones on Sony Ericsson's Web site.

Sony Ericsson's announcement follows green initiatives by other mobile phone makers, including Samsung (who call theirs "Blue Earth") and Motorola (who released the first GreenTech Approved phone, the W233, earlier this year.)