1. Human Impacts on Climate Change
The Greenhouse Effect
The greenhouse effect is a natural warming of both Earth’s lower ATM and Earth’s surface
Major gas – CO2
Without this effect, Earth would be too cold to support life

2. The Greenhouse Effect
Earth re-radiates heat back into the ATM (keeps temperature balanced)
This energy can remain within the atmosphere or return to the surface

3. The Greenhouse Effect
Greenhouse gases absorb some of Earth’s re-radiated heat and causes the Earth to warm naturally
Greenhouse Gases:
H2O (water vapor)
CH4 (Methane)
CO2 (Carbon Dioxide)***
Why do you use a blanket in the winter? To keep warm. Does your body heat escape from the blanket? No it stays trapped under the covers to warm you.
The earths ATM is like a blanket, keeping in the warmth and not letting it escape.

4. The Greenhouse Effect
Humans burning fossil fuels releases carbon dioxide into the atmosphere increasing the greenhouse effect leading to global warming.
Why do you use a blanket in the winter? To keep warm. Does your body heat escape from the blanket? No it stays trapped under the covers to warm you.
The earths ATM is like a blanket, keeping in the warmth and not letting it escape.
Factories could decrease the carbon dioxide levels in the atmosphere by transitioning from burning fossil fuels to using alternative energies

6. Increased CO2 levels has increased global temperatures
Increased temperatures = melting ice caps = rise in sea level

7. Deforestation Trees are vital for life Trees store greenhouse gases
When trees are cut down, they release these gases back into the ATM
20% of global CO2 emissions are caused by deforestation