Because WE are people?
Fossils are important for people because it gives information about the past-life on Earth.
The ozone layer is not only important to people but all organisms. It has the ability to stop harmful rays.
What hero's do is important in a few ways. A hero does things that help people and earth and are looked up to on what they do.
Because people started to worry about pollution and earth so they decided to create a day where people all around the world would celebrate that day by planting a tree or doing something for earth.
Because population is about people who lives on earth
So we can understand our heritage from the aliens
Because it is very important.
Because there is no space to live on earth
with out the sun we would not have the foodchain or the foodweb.We would all be dead be now
Drink, observe, clean, help undehydrate people, most important nutrient.
Soil is important to earth soil is needed of all people in the world
Oxygen is important on earth so that all the people and animal's can breath. It is also important to all of our vegetation, crops, and and all of our water supplies. Without oxygen life as we know it would cease.