Now we have our first results. Almost all the control seeds, those watered, with water have germinated. On the contrary, no seeds have germinated in acid media. We will have to wait to the next days.
In the second experiment, seeds have germinated and we can see the small plants in the pots. When they grow, half of them will be treat with an acid solution remembering acid rain.
So, we can have our first conclusions. Would you mind to write them as comments?