# DO NOW! How do you think population growth will impact: 1. The world?

## Presentation on theme: "DO NOW! How do you think population growth will impact: 1. The world?"— Presentation transcript:

DO NOW! How do you think population growth will impact: 1. The world?

Daily Goal Describe how humans have exceeded their carrying capacity
Explain how this causes human suffering, and what we can do to alleviate it

Agenda Warm-Up Population Growth Video Clip Human carrying capacity
Developed countries Undeveloped countries Population Growth Graphing Practice Notes reflection Where do you fall? Closing Exit question

7 BILLION PEOPLE!! http://7billionactions.org/resources.php
7 Billion: National Geographic

Growth Rate: How quickly a population increases or decreases
Depends on births, deaths, and migrations (people coming and going from a country)

Carrying Capacity Maximum number of species that can live somewhere, based on the food, water, and free space If a population exceeds its carrying capacity, species die.

Different Carrying Capacities
Key Point #1: All species have a carrying capacity. Including humans. Every species has a different carrying capacity. Humans have a carrying capacity, too. There are only enough resources on Earth to support a LIMITED NUMBER of humans. A field might have enough resources for 10,000,000 ants, 100 deer, 10 wolves.

Human Carrying Capacity
Key Point #2: In developed (rich) countries, humans have exceeded our carrying capacity because we consume too many resources. We’re going to calculate our ecological footprint: the demand that we place on Earth’s resources to sustain ourselves

American Resource Consumption

If Everyone Lived Like Americans
If everyone lived like Americans, we would need eight Earths to provide all the food, water, and free space that we consume.

Human Carrying Capacity
Key Point #3: In undeveloped (poor) countries, humans have exceeded their carrying capacity because there are too many people. 3.6 billion live in abject poverty (less than \$2 per day) Individually consume very few resources But because there are billions of them, still exceed carrying capacity 3.6 billion ≈ 54% of the world’s total population Technically, it’s \$2.15 USD in 1993 purchasing power parity (PPP) terms. However, as a convention, \$2/day is still widely used when discussing income poverty.

What Does This Mean For Us?
People ARE dying.

Someone dies of starvation every 2.43 seconds
The often-repeated mantra that “world hunger is a distribution problem, not a production problem” is no longer true. This is partially the fault of climate change. We’ll talk about that next week. Someone dies of starvation every 2.43 seconds

2,200 people will die from starvation by the end of today’s class.

Water pollution kills 14,000 people EVERY day
By 2050, 2/3 of the world's population will be without safe drinking water. Leading cause of deaths worldwide

Attack on a United Nations food convoy in the Central African Republic
War for Food and Water Attack on a United Nations food convoy in the Central African Republic

So What Do We Do? Key Point #4: To avoid starvation, dehydration, and war for resources, we need to reduce consumption, reduce population growth, or both. Four main strategies: Voluntarily cut consumption Force people to consume less Contraception, education, and women's rights in the third world Planned birth policy

We could voluntarily cut down on our consumption.
So What Do We Do? We could voluntarily cut down on our consumption.

Or, force people to cut down on their consumption.
So What Do We Do? Or, force people to cut down on their consumption.

Political Policy We could try to discourage births by
providing birth control... Education... ...and increasing women's rights in undeveloped countries, where birth rates are highest.

So What Do We Do? China has a planned birth policy:
Since 1979, citizens have been limited to only one child per couple.

“It is illegal to discriminate against, mistreat, or abandon baby girls.”

Population Growth Graphing Activity
Work quietly at your seat. 2. Answer all questions on the back of your graph paper. 3. Be sure to label your axes, include units, and connect your data points

Notes Reflection (GP) Do humans have a carrying capacity?
Yes. How do humans in developed (rich) countries exceed their carrying capacity? We use too many resources. How do humans in undeveloped (poor) countries exceed their carrying capacity? Even though each person uses very few resources, there are too many people (overpopulation) Give students a minute or two to find the answers to these questions in their notes, before cold-calling. If students cannot find the answers, they should add them in.

Guided Practice (GP) If humans have exceeded their carrying capacity, why aren’t tons of people dying? They are. We just don’t notice, because the USA is rich enough to make sure these problems happen to other people. What can we do to reduce the amount of resources we consume? Voluntarily cut consumption Force people to consume less Contraception, education, women's rights in undeveloped countries Planned birth policy (China) Give students a minute or two to find the answers to these questions in their notes, before cold-calling. If students cannot find the answers, they should add them in.

Where Do You Fall? (IP) Strongly disagree Strongly agree Unsure
Left side of classroom Strongly disagree Right side of classroom Unsure Middle of the room Students move to different parts of the classroom based upon their opinion. Call on students to give their opinions after everyone has finished moving. Give ample time to discuss; people will probably have very different opinions, and disagree heatedly. In particular, EVERYONE is going to agree with the first two prompts, but very few people will agree with the third. Make a really big deal about this. Really press them to explain why. Set the clear expectation that students must respect each other. My students got REALLY heated. It was great to see such passion from them (and such great critical thinking, as they argued with one another!) but make sure they don’t get too personal.

It is wrong for Americans to use more than our share of resources.
Where Do You Fall? (IP) It is wrong for Americans to use more than our share of resources.

Where Do You Fall? (IP) It is bad that people in undeveloped countries suffer because Americans use more than our share of resources.

Where Do You Fall? (IP) Americans should give up luxury items, so that we consume fewer resources.

The government should force people to consume fewer resources.
Where Do You Fall? (IP) The government should force people to consume fewer resources.

Where Do You Fall? (IP) It is a good idea for Americans to spend money to create schools, teach people in undeveloped countries how to use birth control, and advocate for women’s rights.

Where Do You Fall? (IP) The government should make a law that limits how many children we can have, or that stops some people from having children at all.

Population Growth Web Work quietly in pairs to create your web
Use your information to determine the effects of population growth Your web must include the following effects: Aging, Environment, Urban Growth, Environment, Women & Girls, Poverty & Inequality, Young People, Reproductive Health

Exit Ticket What is happening because humans have exceeded their carrying capacity? Which countries are experiencing the most devastation from increasing population growth? What do YOU think should be done about it?

Download ppt "DO NOW! How do you think population growth will impact: 1. The world?"

Similar presentations