Global Warming

Catalyst In which step of the carbon cycle do plants remove CO2 from the atmosphere?

Which step of the carbon cycle is caused by humans only? What happens in it?

What are some negative effects of global warming? (You haven’t learned this yet, but think!)

Objectives

By the end of today, all SWBAT…

Explain how humans cause global warming

Describe the effects of global warming on human welfare

Agenda

Catalyst Discussion The Greenhouse Effect Who cares about a few degrees? Effects of global warming Begin our storybooks Closing Exit Question

The State of our Environment11 out of the last 12 years rank

among the 15 warmest years in history

Our Carbon emissions have increased by 20% since 1990

So what!?

The Greenhouse Effect

Key Point #1: Greenhouse gases trap heat in the Earth’s atmosphere CO2 = the most important greenhouse gas

The good: greenhouse gases are the reason that there is life on Earth!Without greenhouse gases, Earth would be -18°C

The Greenhouse Effect

The Greenhouse Effect

Humans have caused an enormous increase in CO2 concentration since industrial times

Global Warming

Global warming = the increase in global average temperature over time.

Human Causes of Global warming

Key Point #2: Humans cause global warming by increasing the amount of CO2 in the atmosphere Burning fossil fuels

Gasoline Coal

Factory production Plastics

Deforestation Fewer trees to breathe in CO2

Overpopulation Mo’ people, mo’ problems!

What this looks like:

Projected temperature rise of 2-5 °C by 2100

Asia and Africa most affected

Effects of Global Warming

Key Point #3: If we do not do something to stop global warming, its effects will be CATASTROPHIC

CATASTROPHIC!!!

Rising Sea Level

Because glaciers are melting

Climate Refugees

Extreme Weather Events

Tropical Diseases

Desertification

10-20% less food produced in developing countries

Much of United States farmland will become desert

Massive food shortages

Global Warming Storybook

Inconvenient Truth Exemplar

End product: Produce a comic book explaining… What the greenhouse effect is Why the greenhouse effect helps us Two ways humans cause global

warming Two bad things that will occur if we do

not slow down global warming quickly

GP/IP

Rough draft: create a storyboard Sketches of each page Outline of the plot

Must get Mr. LY to sign off on the rough draft before you make the final

Final draft: Will add more panels tomorrow, so DO

NOT FORGET AT HOME!!!

Closing

The Earth is kept warm by greenhouse gases Trap heat in the Earth’s atmosphere CO2

Humans are further warming the Earth by increasing the amount of CO2 in the atmosphere

If we do not do something to stop global warming, its effects will be CATASTROPHIC Can you name some examples?

Exit Questions

What is global warming, and why does it occur? (Hint: use the words “greenhouse gasses” and “traps”)

What are TWO ways that humans cause global warming?

Describe TWO bad things that will occur if we do not combat global warming now.