The following is a comparison of Chinese characters in the Standard Form of National Characters, a common traditional Chinese standard used in Taiwan, the Table of General Standard Chinese Characters, the standard for Mainland Chinese simplified Chinese characters, and the joyo kanji, the standard for Japanese kanji. Generally, the joyo kanji are more similar to traditional Chinese characters than simplified Chinese characters are to traditional Chinese characters. "Simplified" refers to having significant differences from the Taiwan standard, not necessarily being a newly created character or a newly performed substitution. The characters in the Hong Kong standard and the Kangxi Dictionary are also known as "Traditional," but are not shown.
What are also known as "traditional"?
characters in the Hong Kong standard and the Kangxi Dictionary

As in the Scheiner system, speeds were expressed in 'degrees'. Originally the sensitivity was written as a fraction with 'tenths' (for example "18/10 DIN"), where the resultant value 1.8 represented the relative base 10 logarithm of the speed. 'Tenths' were later abandoned with DIN 4512:1957-11, and the example above would be written as "18 DIN". The degree symbol was finally dropped with DIN 4512:1961-10. This revision also saw significant changes in the definition of film speeds in order to accommodate then-recent changes in the American ASA PH2.5-1960 standard, so that film speeds of black-and-white negative film effectively would become doubled, that is, a film previously marked as "18 DIN" would now be labeled as "21 DIN" without emulsion changes.
Why did the definition of film speeds change considerably?
to accommodate then-recent changes in the American ASA PH2.5-1960 standard

General Electric heavily contaminated the Hudson River with polychlorinated biphenyls (PCBs) between 1947-77. This pollution caused a range of harmful effects to wildlife and people who eat fish from the river or drink the water. In response to this contamination, activists protested in various ways. Musician Pete Seeger founded the Hudson River Sloop Clearwater and the Clearwater Festival to draw attention to the problem. The activism led to the site being designated by the EPA as one of the superfund sites requiring extensive cleanup. Other sources of pollution, including mercury contamination and sewage dumping, have also contributed to problems in the Hudson River watershed.
Who founded the Hudson River Sloop Clearwater and the Clearwater Festival to bring attention to the pollution caused by GE?
Pete Seeger