Plant species might have variation in the number of stomata present on their leaves. why

The evaporation of water from the leaf is called transpiration. The number of stomata on leaf surfaces varies widely among different species of plants. ... Researchers have evidence which indicates that stomata densities change in response to changing atmospheric levels of carbon dioxide.

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

hope this any more questions i am here plz mark brainliest

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.