Seed germination is affected by acid rain because of its pH level and its chemical effects causing the seed to die. This also is the same with tree roots, it will become weak and thin.
Have illusions and hallucinations
The effects of LSD strongly depend on the mental state of the user and the circumstances in which the drug is used. Therefore, the same dose can produce good and...
At a constant pH of 3.2 and a total acid content of 0.2%, if you use 100% citric acid, the sourness is an equivalent of 5.5. Swap the acid for 90% citric acid and 10% malic acid and the sourness...
Extreme cold, extreme heat, and lack of moisture would be the most obvious answers. Some types chemicals could probably prevent germination as well if they were in direct contact with the seed.