Science may be chemistry or stuff like that, and it will usually have an experiment for you to do that has something to do with the article. Once there was a big hole in the ground. After a while, dirt falls in. Though it is covered by soil, under the soil, it is still hollow.
Builders come along, and build a busy road over the hole, called a sinkhole.
After it rains, the dirt over the sinkhole becomes mud. So soon the dirt just collapses. And why they're destroying themselves is that they might be at the top of that food chain, and they'd have to stop eating that kids of food, because it wouldn't be around anymore. The second reason is because when they destroy the wetland, they will probably build a city where the wetland used to be, and they'd probably fill in the wetland with dirt. But that makes more floods, because when the wetland was there, all the grass that was there and weeds stopped floods from coming through, and it also cleaned out the water as it came through, because the weeds stopped the dirt and let the water go through, just slower.