How can farms produce renewable energy and reduce their carbon footprint, and how does climate change affect farming?
How energy is used on a farm, the meaning of biomass, the suitability of renewable energy sources such as wind, water, sun and energy crops, ways farmers can reduce their carbon footprint, and the impact of climate change on farming.
A focused CCEA GCSE Agriculture and Land Use answer on renewable energy and climate change, covering how energy is used on a farm, biomass, the suitability of wind, water, sun and energy crops, reducing the carbon footprint, and the impact of climate change on farming.
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What this dot point is asking
CCEA wants you to give examples of how energy is used on a farm, define biomass, evaluate renewable energy sources (wind, water, sun and energy crops) by location, cost, efficiency and environmental impact, describe ways farmers can reduce their carbon footprint, and explain the impact of climate change on farming.
Energy use on a farm
Farms use energy in many ways: running tractors and machinery, heating buildings such as glasshouses and animal housing, lighting, milking and crop drying and storage. Most of this traditionally comes from fossil fuels (diesel, electricity), which cost money and release carbon dioxide.
Biomass and renewable energy
Renewable energy sources a farm could use:
- Wind - turbines generate electricity where it is windy; no fuel cost or emissions once built, but expensive and depend on the wind.
- Water (hydro) - a stream can drive a small turbine for a steady clean supply, but needs a suitable site.
- Sun (solar) - panels generate electricity with no emissions, but output is low on dull days and in winter.
- Energy crops (biomass) - crops such as willow can be grown on spare land and burned, but take up land and need processing.
Each is judged on location, cost, efficiency and environmental impact.
Reducing the carbon footprint
A farmer can reduce their carbon footprint (the total greenhouse gases they cause) by:
- Planting more woodland - trees absorb carbon dioxide.
- Carefully managing carbon-storing habitats such as peatland.
- Conserving energy - efficient machinery, renewable energy and less fuel use.
Impact of climate change on farming
Climate change alters weather patterns, with several effects on farming:
- It changes which crops can be grown in the UK and the timing and reliability of harvests.
- It can increase the incidence of pests and diseases on crops and animals.
- It raises the risk of flooding, giving farmers a role in flood risk management.
Examples in context
Example 1. Solar panels on a shed roof. A dairy farmer fits solar panels to a large shed roof. In summer they generate much of the electricity for the milking parlour, cutting the farm's bills and carbon emissions, though on dull winter days the farm still draws power from the grid, so the panels supplement rather than replace its supply.
Example 2. Growing willow as an energy crop. A farmer plants willow on a wet, low-yielding corner of the farm. The willow is harvested and burned for heat, using land that grew little food, reducing reliance on fossil fuels, but the farmer accepts that the crop takes a few years to establish and needs processing before use.
Try this
Q1. Name two renewable energy sources a farm could use. [2 marks]
- Cue. Wind, water (hydro), the sun (solar) or energy crops (biomass) (any two).
Q2. Give one impact of climate change on farming. [1 mark]
- Cue. Changes which crops can be grown, increases pests and diseases, or raises flood risk.
Exam-style practice questions
Practice questions written in the style of CCEA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
CCEA Unit 1 style6 marksEvaluate the suitability of producing energy on a farm from renewable sources such as wind, water, the sun and energy crops.Show worked answer →
Six marks for considering several sources with advantages and limits.
Wind: wind turbines can generate electricity where it is windy, with no fuel cost or carbon emissions once built, but they are expensive to install, depend on the wind blowing, and some object to the noise or appearance.
Water (hydro): a stream or river can drive a small hydro turbine, giving a steady, clean supply where water flow is reliable, but it needs a suitable site and can be costly.
Sun (solar): solar panels on roofs or fields generate electricity with no emissions, useful in summer, but output is low on dull days and in winter, and panels are costly to install.
Energy crops (biomass): crops such as willow can be grown and burned for heat or power, using spare land, but they take up land that could grow food and need processing.
A good answer weighs location, cost, efficiency and environmental impact for each, and concludes that the best choice depends on the farm. Markers reward several sources, each evaluated, not just listed.
CCEA Unit 1 style4 marksDescribe two ways a farmer could reduce their carbon footprint, and describe one impact of climate change on farming.Show worked answer →
Two marks for the carbon footprint ways and two for the climate change impact.
Reducing the carbon footprint: a farmer could plant more woodland, because trees absorb carbon dioxide; carefully manage habitats such as peatland that store carbon; and conserve energy on the farm, for example by using efficient machinery, renewable energy and less fuel.
Impact of climate change: changing weather patterns affect which crops can be grown in the UK and can change the timing and reliability of harvests; warmer, wetter conditions can increase the incidence of pests and diseases on crops and animals; and more extreme rainfall increases the risk of flooding, giving farmers a role in flood risk management.
Markers reward two genuine carbon-reduction actions plus one clear, explained impact of climate change.
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