21.   Humid air streaming north from the Gulf of Mexico will produce varying amounts of clouds in the Mississippi Valley and Plains.

22.   Humid air streaming northward from the western Gulf will produce varying amounts of clouds and isolated showers in eastern Texas.

23.   In fact, Canadian nuclear power plants produce large amounts of excess tritium for the commercial market, but Canadian law prohibits it being sold for weapons.

24.   In summer, isolated, nearly stationary thunderstorms can produce incredible amounts of rain in a short time but only in one spot.

25.   In the study, obese rats that were genetically modified to have low levels of leptin produced higher amounts of endocannabinoids.

26.   It might be expected that digesting all that fiber would produce large amounts of methane gas.

27.   Like all Tina-edited magazines, it has produced large amounts of red ink.

28.   Meanwhile, its Warner Bros. studio, HBO cable channel, Time Inc. magazines and cable-TV systems are producing record amounts of cash.

29.   Meanwhile, rainfall from a passing tropical cyclone may produce record amounts in late summer and fall.

30.   People far from the equator have developed fair skin to drink in the sun and produce adequate amounts of vitamin D during the long winter months.