Please answer quickly, this is for a school project due tomorrow.
The atmosphere is 30% oxygen which, from my research, would make dragonflies grow to have a wingspan of 2 feet and would make fires start more easily. I've decided that the dragonflies could be pets but I'm not sure how to deal with the fires. I thought about making it a sort of "swamp planet". It's covered in water to prevent fires from starting. The question is,
How will these changes affect the inhabitants?
I thought that they might have webbing between their fingers but I'm still not sure. Any suggestions?
Edit: Several good points have been made. The question now is "Is a planet with a nitrogen-oxygen atmosphere feasible, if the percentage of oxygen is 30%? Would this gas mix be prone to explosions, or fires which would ravage the world?" The fires were my first concern which is why I chose to make it a swamp planet but I'm not sure how realistic this is.
This is not intended to be the community doing my homework for me- I'm asking for help because I actually want to work with this world after the project is over and I want it to be a good one.