When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
(1) slightly lower than that of rain water without thunderstorm
(2) slightly higher than that when the thunderstorm is not there
(3) uninfluenced by occurrence of thunderstorm
(4) which depends on the amount of dust in air.
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
3
