31.   Warm autumns, with unrelieved weeks of tepid soup that retards natural cycles even of flower and insect.

32.   What appear to be wide swings in temperature and current may simply be part of natural cycles of such great length that scientists have yet to properly measure them.

33.   You get in trouble when you interfere with their natural cycle and try to make the plants do what you want, he says.

34.   Environmentalists and a few scientific studies have raised concerns that genetically modified organisms could wipe out native species, disrupt natural cycles and cause other ecological damage.

35.   Failure to do so will further distort the natural cycle of the economy and plunge it into deep depression.

36.   Netanyahu aides say the downturn is part of natural economic cycles.

37.   Some scientists believe global warming is part of a natural cycle of temperature change, while others blame greenhouse gas emissions as a significant contributor.

38.   That worries downstream countries like Cambodia and Laos, where traditional farming and fishing practices depend on those natural cycles.

39.   Steve is co- writing a book on his grandmother and the writing is full of this mix of human experience with the natural cycles of the land.

40.   The process, he said, is part of a natural cycle in which ice shelves grow and then calve icebergs over geological time scales.