We learned how pollution/global warming affects the salmon in ways like causing the water to be too warm so the salmon might die an overheated environment.

Also, since the majority of the salmon went to the food smelling side, it proves that pollution can cause the fish to be unable to find food because they can't smell it.

We also learned that experiments won't be perfect no matter how perfect you try to make it, like we learned that experimenting with live animals is very difficult because its like knowing what will happen tomorrow because they're living things so anything could happen. Sometimes it could be the environment is too dry or the temperature is too high that affects the environment.