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Energy

Towards a sustainable energy supply

  • 3 things to know
  • Paper 2 section C

Overview

Carbon footprints, energy conservation in homes, workplaces and transport, demand reduction, more efficient use of fossil fuels, and why small local renewable schemes suit poorer rural areas, with the Chambamontera micro-hydro scheme in Peru.

What you need to know

Answer each one before you reveal it.

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Key term

What is a carbon footprint?

Key term

Why does the energy an individual uses matter to national demand?

Key term

What is energy conservation?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is a carbon footprint?

    Model answer

    A measure of the greenhouse gases a person, product or organisation is responsible for releasing, usually given as a mass of CO₂.

  2. 2

    Name three parts of everyday life that make up a person's carbon footprint.

    Model answer

    Heating and powering the home, travelling by car or plane, and the food and goods bought, each of which took energy to produce and deliver.

  3. 3

    Why does the energy an individual uses matter to national demand?

    Model answer

    A country's total demand is the sum of millions of households, so a change in how ordinary people heat their homes, travel and shop shifts what the country must supply.

  4. 4

    What is energy conservation?

    Model answer

    Reducing the energy that is used or wasted, so existing supplies stretch further and less new supply has to be found.

  5. 5

    Give three features that make a house energy efficient.

    Model answer

    Thick loft and cavity wall insulation, double or triple glazing, and turning the main windows towards the sun so the rooms are warmed and lit naturally.

  6. 6

    How does a smart meter or programmable thermostat cut household energy use?

    Model answer

    It shows exactly how much is being used and heats rooms only when they are occupied, so waste becomes visible and easy to remove.

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