21.   Mercury spills are still a problem in the western world, and are a growing concern in developing countries, particularly in industries such as gold mining.

22.   Nationally, the spills were most common in counties with chemical companies or heavy industry.

23.   Oil spills are a fact of life in a society that runs on fossil fuels.

24.   Other spills were far smaller, in the tens of gallons each.

25.   Recumbent riders say spills are less severe, with riders falling sideways instead of forward and over the handlebars.

26.   Scientists and government officials said the original spill is so widely dispersed that in many areas it is merely a sheen.

27.   Spills are tough to clean and it can rot when it gets wet.

28.   Some environmentalists said the spill is one of many indications that Yosemite and its environs are overbuilt, threatening the natural beauty and biological integrity of the park.

29.   Store the kerosene outdoors in tightly sealed metal containers and always refuel the stove outdoors, where accidental spills will be less hazardous.

30.   State officials argue that an oil spill could be devastating to fish and wildlife and to the local economy.