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CO2 Saver

By C02 Saver Free Editors' Rating

Editors' Review

Download.com Staff Feb 27, 2009

It duplicates Windows functionality, but this freeware power settings app also adds a search box to your desktop and lets you know how much C02 you didn't create. CO2 Saver's interface is barely more than a search box and an options menu. Most could use this app with no instruction, and that's about what you get. A single online page serves as the program's introduction and instruction manual.

Setting CO2 Saver's options takes just a minute. You can use a four-option pull-down menu for preset values, or set custom values for Monitor shutdown, Disk Drives stop, and Sleep Mode settings. Each uses radio buttons and pull-downs to set minutes of inactivity before shutting down the item. Each item can be set from one to 9,999 minutes of inactivity. Shutting down the monitor is quick and painless. It's noted that some apps could interfere with shutting down the Disk Drives, but our testers didn't encounter this problem. The utility can initiate sleep mode if the system doesn't go into the desired mode properly. The search box is easily set to use Google, Yahoo, MSN, Ask, or A9 for searching. And, of course, you'll get to see how much carbon dioxide you saved with the settings.

You could easily use Windows Power options to manage these settings, but some may like seeing the environmental impact of their changes. C02 Saver is freeware and suitable for anyone.

Full Specifications

What's new in version

This version is the first release on CNET Download.com.


Release November 7, 2008
Date Added June 26, 2007

Operating Systems

Operating Systems Windows, Windows XP, Windows Vista
Additional Requirements None


Total Downloads 7,999
Downloads Last Week 0
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Developer's Description

CO2 Saver is a lightweight program that manages your computer's power usage when it's idle, saving energy and decreasing the demand on your power utility.

The less electricity produced, the fewer harmful emissions and greenhouse gases such as carbon dioxide (CO2) are released into the atmosphere.