Presentation on theme: "DO NOW! How do you think population growth will impact: 1. The world?"— Presentation transcript:
1DO NOW! How do you think population growth will impact: 1. The world? 2. NC?3. Your life?
2Daily Goal Describe how humans have exceeded their carrying capacity Explain how this causes human suffering, and what we can do to alleviate it
3Agenda Warm-Up Population Growth Video Clip Human carrying capacity Developed countriesUndeveloped countriesPopulation Growth Graphing PracticeNotes reflectionWhere do you fall?ClosingExit question
47 BILLION PEOPLE!! http://7billionactions.org/resources.php 7 Billion: National Geographic
5Growth Rate: How quickly a population increases or decreases Depends on births, deaths, and migrations (people coming and going from a country)
6Carrying CapacityMaximum number of species that can live somewhere, based on the food, water, and free spaceIf a population exceeds its carrying capacity, species die.
7Different 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.
8Human 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
10If 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.
11Human 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 resourcesBut because there are billions of them, still exceed carrying capacity3.6 billion ≈ 54% of the world’s total populationTechnically, 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.
13Someone 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
142,200 people will die from starvation by the end of today’s class.
15Water 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
16Attack on a United Nations food convoy in the Central African Republic War for Food and WaterAttack on a United Nations food convoy in the Central African Republic
17So 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 consumptionForce people to consume lessContraception, education, and women's rights in the third worldPlanned birth policy
18We could voluntarily cut down on our consumption. So What Do We Do?We could voluntarily cut down on our consumption.
19Or, force people to cut down on their consumption. So What Do We Do?Or, force people to cut down on their consumption.
20Political 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.
21So What Do We Do? China has a planned birth policy: Since 1979, citizens have beenlimited to only one child per couple.
22“It is illegal to discriminate against, mistreat, or abandon baby girls.”
23Population 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
24Notes 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.
25Guided 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 consumptionForce people to consume lessContraception, education, women's rights in undeveloped countriesPlanned 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.
26Where Do You Fall? (IP) Strongly disagree Strongly agree Unsure Left side of classroomStrongly disagreeRight side of classroomUnsureMiddle of the roomStudents 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.
27It 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.
28Where Do You Fall? (IP)It is bad that people in undeveloped countries suffer because Americans use more than our share of resources.
29Where Do You Fall? (IP)Americans should give up luxury items, so that we consume fewer resources.
30The government should force people to consume fewer resources. Where Do You Fall? (IP)The government should force people to consume fewer resources.
31Where 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.
32Where 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.
33Population Growth Web Work quietly in pairs to create your web Use your information to determine the effects of population growthYour web must include the following effects:Aging, Environment, Urban Growth, Environment, Women & Girls, Poverty & Inequality, Young People, Reproductive Health
34Exit TicketWhat 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?