About 12-14 years ago, we disucssed fashion theme at Motorola

来源: by心言 2015-12-11 09:32:49 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读: 0 次 (589 bytes)
本文内容已被 [ by心言 ] 在 2015-12-11 09:42:47 编辑过。如有问题,请报告版主或论坛管理删除.

They also knew that about cellphones, but apparently did not go that route. It is quite abusive to have people abandon their cellphones every other year. The trouble is that many ores are diminishing or extinct. There is no Indium ore on earth anymore, this metal used to cost $75/lb but $15000/lb 3 years ago. The rare earth metals are being wasted along with heavy environmental polution. We haven't found good ways to use rare earth metals efficiently yet, and they are probably the most important elements for space exploration.

 

 

请您先登陆,再发跟帖!

发现Adblock插件

如要继续浏览
请支持本站 请务必在本站关闭/移除任何Adblock

关闭Adblock后 请点击

请参考如何关闭Adblock/Adblock plus

安装Adblock plus用户请点击浏览器图标
选择“Disable on www.wenxuecity.com”

安装Adblock用户请点击图标
选择“don't run on pages on this domain”