I read with interest the story "Longest Train Tunnel" [Best of What's New, December 2011], The only problem is that nowhere in the article did it say how long the tunnel is. Military secret? Or is it just "really long"? Tom Wright Lakewood, Calif. The editors reply: Sorry about that. The tunnel is 35.4 miles lony. CAVE CARS I was disappointed to see that Best of What's New recognized so many engines and vehicles that still burn gasoline and diesel fuel. That's like giving an award to a new, longer-lasting cave paint. Fossil fuels are dirty and inefficient, and renewable energy sources can replace them. An electric car like my Nissan Leaf is more than 90 percent efficient and can run on solar power from my home GRID Tied system. I run my home and car, still help the local utility, and get netmetering credits each month.
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机译：我很感兴趣地读了故事“最长的火车隧道” [Best of What's New，2011年12月]，唯一的问题是，文章中没有任何地方说隧道有多长。军事秘密？还是只是“真的很长”？加利福尼亚州汤姆·赖特·莱克伍德（Tom Wright Lakewood），编辑们回答：很抱歉。隧道长35.4英里。探洞汽车令我感到失望的是，“最新动态”认可了这么多仍在燃烧汽油和柴油的发动机和车辆。就像授予新的，持久的洞穴涂料一样。化石燃料肮脏且效率低下，可再生能源可以替代它们。像Nissan Leaf这样的电动汽车的效率超过90％，并且可以通过我的家用GRID Tied系统使用太阳能发电。我经营自己的房屋和汽车，仍然为当地的公用事业提供帮助，并每月获得净计量学分。
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