21.   They also took tablets, called NAPS, to counteract the effects of chemical and biological warfare.

22.   And they are now working on a chemical spray to counteract the effects of the substance, which they believe should be ready for testing in the next decade.

23.   The steps followed a series of other fiscal measures taken since October to counteract the effects of long-standing political unrest, droughts and floods on the economy.

24.   Traders were encouraged to buy on perceptions that forecast rains would not be enough to counteract the effects of a heat wave that has recently struck growing regions.

25.   Taiwan stepped up efforts Thursday to counteract the effects of imminent Chinese military exercises on economic and political confidence in the nationalist island.

26.   That -- along with pressurized suits that force bodily fluids into the feet and legs -- helps counteract the effects of weightlessness.

27.   The ministry said the Canadian pilot appeared to have increased the speed beyond the safety limit to counteract the effect of the crosswinds.