Line Gordon is a scientist who studies how people use natural resources, like water and land. She wants to find ways to use these resources in a way that won't hurt the environment.
Imagine you have a big candy jar, but you don't want to eat all the candy at once because it will be gone too fast. Line Gordon tries to figure out how much candy you should eat each day so that you won't run out too quickly. She also thinks about ways to share the candy jar with other people, so everyone can have a fair share.
Now, instead of a candy jar, imagine you have a big water bottle. Line Gordon thinks about how many sips of water you should drink each day, so you won't run out of water too fast. She also thinks about how to make sure that the water is clean and safe to drink, so you won't get sick.
Line Gordon studies things like this to help people understand how to use natural resources in a way that won't hurt the Earth. By taking care of the Earth, we can make sure that we have enough resources for future generations to enjoy.