HANDY Model of Societal Collapse from Ecological Economics Paper 

Aqui se apresenta a simulação proposta no curso Thinking Complexity para o problema da pesca sustentável em um determinado local.

Thanks for taking the time to look at my model on how greenhouse effect impacts food security!

This is a heavily simplified model of the revenue generated by oil extraction and the pension fund. The oil reserves are a stock already considered in monetary value. Every year part of this stock goes to people working in the oil industry, the shareholders, or directly into the pension fund. Part of the workers' wages go to the pension fund as long as there are wages coming from the oil company. This money flow is stopped once the oil reserves are depleted. The payouts to the shareholders are not taxed, however the wealth of the shareholders is flat-taxed with a fixed percentage. This flow is nicknamed "Tax the Rich".

•Dry Period Case

HANDY Model of Societal Collapse from Ecological Economics Paper 

This model incorporates several options in examining fisheries dynamics and fisheries employment. The two most important aspects are the choice between I)managing based on setting fixed quota versus setting fixed effort , and ii) using the 'scientific advice' for quota setting  versus allowing 'political influence' on quota setting (the assumption here is that you have good estimates of recruitment and stock assessments that form the basis of 'scientific advice' and then 'political influnce' that desires increased quota beyond the scientific advice).

MEE460-04

This is a model depicting Durham region waste management. It shows 4 types of waste, what township they come from, and how much waste (in tonnes) comes from each of the 3 townships in the Durham Region with a Durham Region-owned waste management facility. The garbage leftover from each township after removing everything recyclable, compostable, and reusable, is sent to the Durham York Energy Center to create energy from the garbage. 

•Wet Period Case

HANDY Model of Societal Collapse from Ecological Economics Paper 

HANDY Model of Societal Collapse from Ecological Economics Paper 

Building a simple model to understand how to run a profitably fishing business

There is a general belief that wind and solar will enable us to get fossil-fuels-use to net-zero. This is, unfortunately, impossible as an examination of only some limitations and constraints associated with solar and wind energy will show. Solar panels and wind turbines have now been used for many years, but until now they represent only a tiny fraction of total energy use (not just electricity but all forms of energy).  In 2020, wind accounted for 3% of the world’s total energy consumption and solar amounted to 1% of total energy. Thus, the combination of wind and solar produced only 4% of world energy in 2020. How long will we have to wait before they can generate enough energy to power the world? The climate emergency will not wait.  Solar panels and wind turbines have average lifespans of around 15 to 30 years, then they need to be replaced. However, the manufacture of the replacements will require fossil fuels since one cannot use wind or solar to build wind and solar. Further, solar panels do not supply enough energy. The net-energy gained from solar panels is only about 3.9:1. This net-energy ratio is known as ‘energy return on energy invested’ (EROI) and is critically important.  Unfortunately, the EROI of solar is far too low to power a modern industrial society, which requires an EROI of about 12:1. There is also the question of space. Renewable energy sources can take up 1000 times more space than fossil fuel – that is bad news for agriculture and food production in a world that is already experiencing food shortages because of global warming. If you take these limitations into consideration, then it becomes clear that solar and wind cannot solve our energy problem – they are a fix that will inevitably fail.