Ana - Environmental Awareness P2 Flashcards
What is the great acceleration? Opportunities/Challenges?
Followed on from the industrial revolution, population increases as people get healthier and richer.
Opportunities:
fossil fuels = large amount of energy
fertilisers and pesticides = the green revolution, increased crops and yields
chemicals and medicines = increased life-expectancy
Challenges;
oil and energy dependency
increased waste production
ecological consequences of chemical spread
air emissions and water pollution stress
What are ecosystem services?
A number of regenerative, cycling processes taking place in ecosystems and that mitigate the impact of human resources and sustain it with vital resources. Mitigation comes with buffering and remediating some of the negative impacts of pollution, e.g water bodies such as lakes and rivers, and the associated river banks, sediments and vegetation are often able to treat, retain or absorb a certain level of anthropogenic pollution, such as heavy metals from mining activities or nutrients from intensive agriculture. These services provide us with food, shelter, energy, biodiversity, and cultural/social resources.
By recognising them as services/natural capital and not just our environment, we recognise they have a value that is vital to our well-being and we can quantify how much we depend on them, use them and what would be the consequences if we destroy them. This provides a framework for the protection and sometimes
even the restoration of ecosystems.
What is environmental management all about?
Balancing r1, r2 and r3. The rates of: at which we
produce waste, the rate at which we are able to treat this waste and convert it into resources and the
rate at which we consume our resources.
What is the anthropocene?
The age of man, a new name for the current geological epoch defined by our own massive impact on the planet’s climate and ecosystems.
What is biodiversity?
The variety of all form of life on Earth, including the variability within and between species and within and between ecosystems.
What is the biosphere?
The sphere of all land, air and water on the planet in which all life is found; the global ecological system integrating all living beings and their relationships.
What is ecosystem?
All the organisms in a given area, along with the physical environment with which they interact.
Ecosystem services quick def
The benefits people obtain from ecosystems e.g provision of clean water, regulation of climate, pollination of crops, fulfilment of people’s cultural needs.
Planetary boundaries quick def
A concept developed by researchers in 2009 to describe the nine safe biophysical boundaries outside which the Earth system cannot be pushed without disastrous consequences.
What is resilience?
The capacity of a system - be it a forest, city or economy - to deal with change and continue to develop; withstanding shocks and disturbances (such as climate change or financial crises) and using such events to catalyse renewal and innovation.
What is social innovation?
An innovative product, process or programme that profoundly changes the basic routines, resources and authority flow of beliefs of any social system.
What are the 9 planetary boundaries?
- Phosphorus flow - Climate change (surpassed) - Ocean acidity - Freshwater consumption - Ozone depletion - Atmospheric aerosol load (not yet measured) - Chemical pollution (not yet measured as difficult to quantify) - Agricultural land use - Biodiversity lost (surpassed) - Nitrogen flow (surpassed)
Nitrogen flow in depth example
Haber-Bosch process (1910) is the driving force behind the ‘Green Revolution’. We could overcome nutrient limitation in farming and mimic the natural pathways for nitrogen fixation occurring by microbial communities in plant roots and synthetically produce ammonia from nitrogen gas. 450 mil tonnes of nitrogen fertiliser produced per year. Ammonia + pesticides have quadrupled the productivity of land and agriculture, but excess nitrogen availability puts a dramatic burden on the natural nitrogen cycle as the rate of production of ammonia is several orders of magnitude higher than the rate of nitrification (NH3 to NO3) and denitrification (NO3 back to N2). Accumulation of ammonia and nitrates is toxic and provides nutrients that can lead to eutrophication of aquatic bodies. Requires wastewater treatment processes but these use up a lot of energy.
Ocean acidification in depth example
Approx 40% of anthropogenic CO2 dissolves in the oceans. CO2 reacts with water and forms carbonic acid -> led to decrease of 0.1 in pH and 30% increase in H+ ions with damaging consequences on all sorts of aquatic organisms and microbial processes that have enzymatic processes that rely on a very specific pH range. Possible solution is to sequester carbon using carbon capture and utilisation or storage.
Brundtland report our common future sustainable development definition
Development that meets the needs of the present without compromising the ability of future generations to meet their own needs