unit 3 - global resources consumption and security Flashcards
biocapacity
capacity of land and water to provide resources for humanity
circular economy
- economy that is regenerative (long-term)
- e.g.: electrical devices are designed in such a way that they are easier to repair
ecological footprint
model that is used to estimate the demands that a human population places on the environment (biocapacity/demand)
virtual water
water used in the production of goods and services we use
energy security
the availability of energy sources at an affordable price
carrying capacity
the number of people a place can support
nexus
perspective of sustainability and the inter-relationship between food, water, energy
optimistic views / Anti-Malthusian
- esther boserup
- threat of starvation motivates agricultural innovation (green revolution)
- supports idea that ‘necessity is the mother invention’
pessimistic views / Neo-Malthusian
- thomas malthus - “cycle of misery”
- pop. growth is exponential where increase in food is arithmetic
- focuses on problems that will ensue as pop. growth exceeds carrying capacity
- had checks proposed for when pop. growth exceeded food supply (sexual abstinence, delayed marriage)
physical water scarcity
water resource development exceeded sustainable levels
renewable energy
wind, solar and hydro power sources which result from a flow of energy from the sun, wind or water
resource stewardship / balanced views
- “humans = ‘caretakers’ of the natural world.”
- suggested as strategies for sustainably managing natural resources
- conservation + preservation of resources
sustainability
meeting needs of the present without compromising the ability of future generations to meet their own needs
sustainable development goals
adopted by UN in 2015
universal call to action to end poverty, protect the planet and ensure that all people enjoy peace and prosperity by 2030
water withdrawal
freshwater taken from ground water sources, either permanently or temporarily