| American biometeorologists devote their energies to relationships with relatively straightforward cause and effect. |
| There appears to be clear cause and effect evidence, but no irrefutable proof. |
| Whether this represents a cause and effect relationship or simply is correlative remains to be determined. |
| But as he has noted, correlational studies say little about cause and effect. |
| It is, as biological chains of cause and effect go, a fairly simple concatenation of events. |
| Insufficient evidence is available to judge whether this relation is cause and effect. |
