ELI5: Explain Like I'm 5

American Acclimatization Society

The American Acclimatization Society (AAS) was a group of adults who lived a long time ago and wanted to introduce plants and animals from different parts of the world to America. This was really important because they believed that having new plants and animals would make America stronger, healthier, and better overall.

You know how sometimes when you go on a trip to another place, you might feel weird because the weather is different and the food is different? Well, that's sort of what the AAS wanted to help fix. They thought that if they brought plants and animals from other places to America, those things would get used to the new weather and environment and be healthier because of it. And then they could bring people from other parts of the world to America too, and everyone would be healthy and happy together!

For example, the AAS brought in fish like carp and trout from Europe to help create a whole new fishing industry in America. They also brought in birds like the sparrows and starlings, which we still see today, to try to reduce pests that were harmful to gardens and crops.

While it might have seemed like a good idea at the time, bringing in these new plants and animals actually hurt the environment in some ways. Some of the animals they brought were invasive, meaning they didn't have natural predators in America and ended up hurting other animals and plants instead. Other animals, like the sparrows, ended up just causing new problems.

So, while the AAS had good intentions, it's important to remember that introducing new plants and animals to an environment can have unintended consequences. Nowadays, people are much more careful about introducing new species to a place where they don't belong.