A few typos in the letter: The symbol for kilowatt hour is kW·h, not kWh. The word "degree" is misspelled as "dgree". "The articles states" is ungrammatical. One of the s's is extra.
Also, the section about radiation units should mention the becquerel. I heard a story about Fukushima this morning on NPR, and the reporter seemed to confuse radioactive matter with radiation. I've heard statements such as "there are so many sieverts of radiation in the air", which doesn't make sense - there's nothing to measure in sieverts unless there's a biological body absorbing the radiation. Radiation can be measured in becquerels per square meter, or an amount of radioactive matter can be measured in becquerels. Pierre -- lo ponse be lo mruli po'o cu ga'ezga roda lo ka dinko
