1.   Chlorofluorocarbons need to be completely phased out because of their contribution to the greenhouse effect, say two researchers at the University of Munster, Germany.

2.   The agent which causes the scrapie disease in goats and sheep can survive for up to three years in soil, say researchers at Maryland University.

3.   And that, say researchers, is why transplants should be done only at centers of excellence where the results will be sure to go into the scientific literature.

4.   Bicycle accidents that seem minor can cause serious abdominal injuries in children, say researchers in Philadelphia who have designed a handlebar that they hope will make biking safer.

5.   Adult height depends mostly on a single gene, say researchers in the United States.

6.   But now they are pushing against the very limits of human potential, say researchers.

7.   But the bigger problem, say researchers, is the spectrum of not- banned substances that athletes take deliberately.

8.   But there are still gaps, say poverty researchers.

9.   Cannabidiol, a natural component of the marijuana plant, shows promise as a potential treatment for stroke, say researchers who tested it in rat brains.

10.   Cigarette smoke, say researchers, can carry bacterial spores and other germs deep into the lungs, where they can germinate and cause infections.