Non-renewable and non-clean energy

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Commuting by car or cycle - which is better?

Keywords: bicycle, Carbon footprint, consumption, cycling, energy, Food, spreadsheets

It's not actually that clear...

We set out to find how much of a change it would make environmentally if one cycled instead of drove to work and then further expanded our findings to include the variables of diet composition and material goods ownership.

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5 years 27 weeks ago

Food, Energy and the Environment

Keywords: energy balance, Food, greenhouse gases

How do we feed nine billion people without destroying our environment?

The primary function of food is to provide our bodies with energy. Most of this energy comes ultimately from oil, with a little sunlight added, and its production is an energy-inefficient process.

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5 years 27 weeks ago

What do I (we) do about my (our) carbon footprint?

Keywords: Carbon footprint, reduction

A very frequent question asked by students after learning about climate change is "But what can I (we) do about it?". Here are some ideas, all of which have benefits in addition to reducing greenhouse gases, and so are worth considering even if you reject the idea of anthropogenic global warming completely.

Here is a set of suggestions for science students who wish to take action to reduce their own and their family's or community's carbon footprint. Most of the ideas are about education and attitude. We also list three achievable ways of reducing your annual emissions by least a tonne of carbon dioxide.

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5 years 43 weeks ago

Energy and Power

Keywords: definition, energy, types, useage

What is energy? Why is it such a useful concept? How does it relate to power?

Energy is the capacity to do work (both are measured in Joules). Power is the rate at which energy is transformed from one state to another, often from a stored state into work (a Joule of energy transformed per second is a Watt of power). Subsistence living requires about 200 W per person. Western living requires about 10 kW per person. Humankind currently uses about 12.5 TW of power, most from fossil fuels. Ten billion people living a western lifestyle (the not-impossible goal of many futurists) would require 100 TW of power.

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6 years 5 weeks ago

Oil Sands (a.k.a. Tar Sands)

Keywords: fluid-particle physics, Oilsands, Stokes' Law

How do you separate bitumen from sand with the least energy cost?

Separating bitumen from sand involves the clever use of simple fluid physics.

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6 years 15 weeks ago

Energy and Greenhouse Gas (GHG) Calculations

Keywords: carbohydrates, energy, GHG production

How much Chemistry and Biology do you need to understand to estimate energy and greenhouse gas production? Very little.

Gain a basic understanding of energy and GHG production calculations.

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7 years 19 weeks ago
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