Copper Manganese Iron Silicate 
Answer: Iron
If you have any tempered glass table tops in your home or office, you’ve likely noticed that the edges of many sheets of tempered glass have a greenish tint. Despite the glass looking perfectly clear and neutral when viewed from above, when viewed from the edge there is a distinct coloration. Why?
The green tint found in most tempered glass is a result of iron used in the production of glass sheets, where it is added as an ingredient to act as a lubricant. In fact, except in manufacturing processes designed to minimize iron use to avoid the green tint, you’ll find that green cast in all sheets of glass–not just tempered glass.
The green tint doesn’t become as apparent until the glass is of a certain thickness, however, so you don’t notice it when looking at a very slender piece of glass sheeting (like the plate glass in windows or picture frames). Typically, thicker sheets of glass are tempered for safety for their use in table tops, showers, and so on, and people have come to associate the green tint with the tempering process (even though a sheet of regular glass of similar thickness would look just as green).
Mac OS X offers no “Uninstall a program” interface like the one available in Windows. You have to uninstall applications by dragging their icons around — but what about applications that don’t have shortcuts, built-in system apps, and other corner cases?
The WinSXS folder at C:WindowsWinSXS is massive and continues to grow the longer you have Windows installed. This folder builds up unnecessary files over time, such as old versions of system components.
The Windows Event Viewer shows a log of application and system messages – errors, information messages, and warnings. Scammers have used the Event Viewer to deceive people – event a properly functioning system will have error messages here.
Yes, Android devices have serious security problems. There’s Android malware out there — mostly outside the Google Play Store. The biggest problem is that most Android devices don’t get security updates. Android antivirus apps aren’t a solution to these problems.
Shout “Windows 8” and you’re likely to hear “Vista” echoed back at you. For Microsoft, Windows 8 has received a Vista-like reception and it’s showing in tepid sales and an abysmal market share.
Are you using Apple’s Mail app on your Mac? Then you’re losing gigabytes of space you could be putting to better use! The mail app wants to cache every single email and attachment you’ve ever received offline.
In 2012, Google’s Dianne Hackborn threatened to revoke CyanogenMod’s access to the Android Market if they moved forward with adding “Cornerstone” multitasking to their custom ROM. Samsung has since created their own multi-window multitasking feature.
The Disk Cleanup tool included with Windows can quickly erase various system files and free up disk space. But some things–like “Windows ESD Installation Files” on Windows 10–probably shouldn’t be removed.
We’re collectively staying up later, sleeping less, and enduring a lower quality of sleep thanks to the abundance of electronic distractions and the accompanying bright screens. For your health and happiness, it’s time to do something about it.
When you a delete a file, it isn’t really erased – it continues existing on your hard drive, even after you empty it from the Recycle Bin. This allows you (and other people) to recover files you’ve deleted.
