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Malthus expressed a pessimistic view over the dangers of over population and claimed that food supply was the main limit to population growth. He believed that the human population increases exponentially (2, 4, 8, 16, 32 etc), whereas food supplies can only grow arithmetically (2, 4, 6, 8 etc). Malthus said that there are therefore ‘checks’ on the population. He identified two different types of checks on the population which would limit further population growth. These are; preventative or negative checks and positive checks. With these checks he saw them as a natural way of keeping the population at a sustainable level. As if the population went over the crisis point there would be misery; were positive checks on mortality would kick in. As if a government wanted to stop or reduce population growth it would use moral restraint were negative checks on fertility would be enforced.

In 1965 Ester Boserup, a Danish economist asserted that an increase in population would stimulate technologists to increase food production. As boserup said any rise in population would increase demand for food and this would act as an incentive to change agrarian technology and produce more food. Her theory can be summed up by the sentence ‘necessity is the mother of invention’. Therefore population growth will spark innovators who will sovle the problem s the increasing population has caused therefore making it sustainable for a growing population.

KEY WORDS: Mega dams Social Economic Environmental Political

hello i am emma

Malthus vs Boserup

Water Civilization?

Lost Civilization - Zainab

Significant Concept: To understand how the over utilization of resources can lead to the destruction of a population

Future pridictions to think about: 1.Where in the world do you think a similar scenario may happen? Explain your answer. 2.Do you think it would be allowed to happen again? Explain your answer. 3.What factors may prevent Malthus's theory from happening again.

Rapa Nui Civilization: To watch the video here is the link:

Useful Links: 1. 2. 3. 4.

Food Revolution

Mega Dams - Sasha

KEY QUESTIONS: 1. What is a mega dam? 2. Why are they built? 3. Name a series of dams that are in use in the world today. 4. What are the positive impacts of a dam? 5. What are the negative impacts of a dam?

Malnutrition - Zainab

To understand the concept of malnutrition and to develop a case study example.

How can lifestyles choices impact the food you eat?

How problems can malnourishment bring to a society? Read this article to help you

Food Insecurity - Sasha

KEY WORDS: Food Insecurity Famine Food Aid

Energy -Taj Qureshi

Water Everywhere

Key Terminology ReplenishableWater PreservationSafe Drinking WaterHydrological Cycle

Hydrological Cycle evaporation, condensation, precipitation, infiltration, runoff

Why have people manipulated different sources of water water? Water is love, Water is life

What impacts have humans had on water? - Climate change increase, Glaciers melting -

Energy/ Emma 1. Why has the overall world consumption of energy increased over the years? 2. Why is the oil becoming more expensive over the years?

Supply and demand. Shikhar here, Supply and demand is perhaps one of the most fundamental concepts of economics and it is the backbone of a market economy. Demand refers to how much (quantity) of a product or service is desired by buyers. The quantity demanded is the amount of a product people are willing to buy at a certain price; the relationship between price and quantity demanded is known as the demand relationship. Supply represents how much the market can offer. The quantity supplied refers to the amount of a certain good producers are willing to supply when receiving a certain price. The correlation between price and how much of a good or service is supplied to the market is known as the supply relationship. Price, therefore, is a reflection of supply and demand. Read more: