1.   On average, environmental factors caused about twice as many cancers as inborn genetic factors.

2.   This suggested that unlike adult cancers, childhood cancers were not caused by factors in the environment.

3.   Various factors caused the consumer boom.

4.   What factors cause the gradual loss of the moss and what can be done to restore the moss?

5.   A Greenpeace spokesman claimed that the deaths were symbolic of an approaching marine meltdown caused by factors ranging from over-fishing to pollution and global warming.

6.   As many as half of all adult women suffer from some form of acne, caused by factors including stress, heredity and hormone levels, the company said.

7.   Academic research suggests that deep-rooted psychological factors cause investors to react slowly to new earnings information.

8.   Both U.S. agencies have argued that other factors may cause the uterine cancers to develop.

9.   But other factors can cause this too.

10.   But, they say, these factors have caused leaders and the public on both sides to regard the issues more seriously.