Nations' pledges to cut emissions called insufficient

Analysts tracking efforts to control greenhouse gas emissions say the reductions pledged by major economies ahead of an envisioned climate pact this year won't be enough to avoid warming the Earth by 2 degrees Celsius (3.6 degrees Fahrenheit) or more.


Tech Q&A: Pushing the limits of a PC's memory has its own limits

Q: In your column two weeks ago, you said Windows ReadyBoost allowed a PC to supplement its RAM (random access memory) with as much as 256 gigabytes of high-speed memory from attached flash memory devices. But when I tried it on my Windows 7 PC, I could use only 4 gigabytes of storage on a 32-gigabyte camera memory card. Why is that?

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