An ecosystem has many abiotic and biotic interactions happening all of the time! These interactions affect how the ecosystem works and how it changes.

People are a part of ecosystems too. Sometimes, people don’t change ecosystems very much when they live in them: Man and son making a canoe out of a single rainforest tree Many Native Americans lived in harmony with ecosystems

And sometimes, people change ecosystems a lot when they move in: What ecosystem changes do you see here?

Sometimes, people create their very own types of “ecosystems.” These “ecosystems” are different from many natural environments in some ways. What kind of an ecosystem would you create? This is Biosphere2, the first human attempt at making a complex ecosystem that is completely indoors. It is in Arizona.) (This is Biosphere2, the first human attempt at making a complex ecosystem that is completely indoors. It is in Arizona.)

Human impact on the Environment  Even though we see severe changes in our environment we don’t know how much is people caused.  Be good Scientists! Question EVERYTHING! Even this presentation.  Famous people claim we are THE ONE REASON for all the changes on earth!  WE are part of the reason. Are we the only reason?

Human impact on the Environment What we know! First A Question!

Human impact on the Environment What we know!  What gas is produced when we burn wood or gasoline? It is the same gas we breathe out.

Human impact on the Environment What we know!  Answer Carbon Dioxide CO 2

Human impact on the Environment What we know!  Carbon Dioxide absorbs sunlight and heats the air around the Earth.

Human impact on the Environment What we know!  For every 1 pound of gasoline we burn in our cars we put 4 pounds of carbon dioxide in the air.

Human impact on the Environment What we know!  What planet near us is mostly Carbon dioxide in its atmosphere?

Human impact on the Environment What we know!  Answer Venus Its atmosphere is 96% Carbon Dioxide and is 462 C.

Human impact on the Environment What we know! This is 430 degrees hotter than any spot on the surface of the earth.

Human impact on the Environment What we know! What else do we see that is changing in our environment?