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Taking a cue from Europe and Japan, the U.S. gets on track with high-speed trains.
Getting “precision agriculture” off the ground may require a better way to look beneath it.
How zinc-air batteries work.
Lithium polymer batteries eventually may squeeze into any shape and go anywhere.
The pioneer of online collaboration explains why peer-to-peer tools are the future.
Is ocean thermal energy conversion finally ready to pump up?
We round up this week’s most intriguing items from around the Web.
MIT’s top energy researcher gives the lowdown on investigations of sustainability, renewable energy and global warming.