Climate Change, Causes and Mitigation for SS 1

Class: SS 1
Term: First Term
Week: 2
Age: 15 years
Duration: 60 minutes
Subject: Crop Production and Horticulture
Curriculum Theme: Ecology, Crop Production and
Focal competence: Understand the impact of climate on crop production and horticulture in Nigeria
Key competencies/values: ICT and Digital Competencies; Digital Competencies; Environmental Literacy
Skills:

• explain the causes of climate change
• discuss mitigation of climate change

Previous Lesson: Climate and Its Elements
Topic: Climate: Meaning And Causes Of Climate Change
Subject Matter: Meaning and causes of climate change, Mitigation of climate change

Specific Objectives

By the end of the lesson, pupils/students should be able to:

Cognitive Domain

• explain the meaning of climate change;
• identify and explain the causes of climate change;
• discuss various methods for mitigating climate change;
• relate climate change and mitigation strategies to crop production and horticulture.

Affective Domain

• appreciate the importance of addressing climate change in agriculture;
• participate actively in group discussions on climate change and its mitigation.

Psychomotor Domain

• demonstrate the ability to search for information on climate change mitigation using digital devices.

Reference Materials

The following resources were used in planning this lesson:

• 2025 New Revised Senior Secondary Education Curriculum (SSEC)
• Relevant State Unified Scheme of Work
• The HeadTeacher Scheme of work For The New Revised Senior Secondary Education Curriculum (SSEC)
• Agricultural Science textbooks for Senior Secondary Schools

Instructional Materials

The teacher will teach this lesson with the aid of:

• Digital devices (laptops, tablets, smartphones)
• Internet access
• Posters illustrating climate change effects
• Charts showing global temperature trends
• Pictures depicting causes and impacts of climate change on agriculture
• Whiteboard/Blackboard and markers/chalk

Rationale for the Lesson

This lesson is important because climate change poses a significant threat to agricultural productivity and food security in Nigeria. Understanding its causes and mitigation strategies empowers students to contribute to sustainable crop production and environmental conservation. It also equips them with knowledge to adapt farming practices to changing climatic conditions.

Prerequisite/Previous Knowledge

Students should have basic knowledge of weather, climate, and general agricultural practices from their Junior Secondary School (JSS) Agricultural Science lessons.

Lesson Content/Board Summary

Climate: Meaning And Causes Of Climate Change

Meaning of Climate Change

Climate change refers to significant and long-term shifts in global or regional climate patterns. It involves changes in average temperatures, precipitation, wind patterns, and other climatic variables over several decades or longer. For crop production, these changes manifest as:

1. Unpredictable rainfall patterns: Leading to droughts or floods, affecting planting and harvesting seasons.
2. Increased temperatures: Causing heat stress on crops and livestock, altering growing seasons.
3. Extreme weather events: Such as severe storms, hailstorms, and strong winds, which can destroy crops and infrastructure.
4. Changes in pest and disease distribution: Warmer climates can allow pests and diseases to spread to new areas or increase their life cycles.

Causes of Climate Change

Climate change is primarily caused by human activities that release greenhouse gases into the atmosphere, trapping heat and warming the planet. The main causes include:

1. Burning of Fossil Fuels: The combustion of coal, oil, and natural gas for electricity generation, transportation, and industrial processes releases large amounts of carbon dioxide (CO2) and other greenhouse gases.
2. Deforestation: Forests act as carbon sinks, absorbing CO2 from the atmosphere. When forests are cut down or burned, the stored carbon is released, and the capacity to absorb future CO2 is reduced.
3. Industrial Processes: Various industrial activities, such as cement production and chemical manufacturing, release greenhouse gases like CO2, methane (CH4), and nitrous oxide (N2O).
4. Agriculture: Certain agricultural practices contribute significantly to greenhouse gas emissions. These include:
   1. Livestock farming: Ruminant animals (e.g., cattle, sheep) produce methane during digestion.
   2. Rice cultivation: Flooded rice paddies release methane.
   3. Use of synthetic fertilizers: Nitrogen-based fertilizers can release nitrous oxide.
   4. Burning of agricultural waste: Releases CO2 and other pollutants.
5. Waste Management: Landfills produce methane as organic waste decomposes.
6. Natural Factors (Minor): While human activities are the dominant cause, natural factors like volcanic eruptions, solar radiation variations, and orbital changes can also influence climate, but their impact is generally less significant and occurs over much longer timescales.

Mitigation of Climate Change

Mitigation refers to actions taken to reduce or prevent the emission of greenhouse gases, thereby slowing down or reversing climate change. In the context of crop production and horticulture, mitigation strategies include:

1. Reducing Greenhouse Gas Emissions from Agriculture:
   1. Improved fertilizer management: Using precise application techniques (e.g., drip irrigation, slow-release fertilizers) to reduce nitrous oxide emissions.
   2. Enhanced livestock management: Implementing feed additives, improved manure management, and breeding for more efficient animals to reduce methane emissions.
   3. Sustainable rice cultivation: Practicing alternate wetting and drying (AWD) in rice paddies to reduce methane release.
   4. Agroforestry: Integrating trees into farming systems to sequester carbon, provide shade, and improve soil health.
2. Promoting Renewable Energy:
   1. Solar-powered irrigation: Using solar pumps instead of diesel generators to reduce fossil fuel consumption.
   2. Biomass energy: Utilizing agricultural waste to produce energy, reducing reliance on fossil fuels and managing waste.
3. Afforestation and Reforestation:
   1. Planting new trees: On degraded lands or within farms to absorb CO2.
   2. Restoring degraded forests: To enhance carbon sequestration and biodiversity.
4. Improving Soil Carbon Sequestration:
   1. Conservation tillage: Minimizing soil disturbance to retain organic matter and carbon.
   2. Cover cropping: Planting non-cash crops between main crops to protect soil, add organic matter, and sequester carbon.
   3. Composting and organic matter addition: Enhancing soil health and carbon storage.
5. Energy Efficiency in Farming Operations:
   1. Using energy-efficient farm machinery: Reducing fuel consumption.
   2. Optimizing irrigation systems: To minimize water and energy use.
6. Policy and Education:
   1. Government policies: Promoting sustainable agricultural practices and offering incentives for climate-friendly farming.
   2. Farmer education: Training farmers on climate-smart agriculture techniques.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Question and Answer, Explanation, Group Work, Internet Search, Visual Aids.

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Questioning/Engagement

Teacher’s Activity: The teacher greets the students and asks them to recall what they know about weather and climate, and any recent changes they have observed in rainfall or temperature patterns in their local environment, especially concerning farming.

Pupils’ Activity: Pupils respond to the teacher’s questions, sharing their observations and prior knowledge.

Learning Point: Prior knowledge activation

Step 2: Meaning of Climate Change

Time: 10 minutes

Teaching Skill: Explanation/Group Discussion

Teacher’s Activity: The teacher guides students to use posters and pictures to discuss in groups the meaning of climate change, focusing on how it affects crop production and horticulture. The teacher clarifies the definition and provides examples relevant to local farming.

Pupils’ Activity: Pupils discuss in groups, using the provided visuals, and contribute to defining climate change and its impact on agriculture.

Learning Point: Climate change definition

Step 3: Causes of Climate Change

Time: 10 minutes

Teaching Skill: Explanation/Facilitation

Teacher’s Activity: The teacher further guides the groups to discuss the various causes of climate change, referring to the posters and charts. The teacher explains each cause, highlighting human activities and their link to agricultural practices.

Pupils’ Activity: Pupils continue group discussions, identifying and explaining the causes of climate change, and relating them to human activities.

Learning Point: Causes of climate change

Step 4: Impact on Crop Production (Reinforcement)

Time: 5 minutes

Teaching Skill: Connection/Reinforcement

Teacher’s Activity: The teacher asks students to briefly summarise how the identified causes of climate change directly affect crop yield, planting seasons, and pest/disease incidence in Nigeria, based on their earlier discussions.

Pupils’ Activity: Pupils provide short summaries, linking climate change causes to agricultural impacts.

Learning Point: Agricultural impact understanding

Step 5: Mitigation of Climate Change

Time: 10 minutes

Teaching Skill: Guided Research/Discussion

Teacher’s Activity: The teacher guides students to search the internet and other relevant materials (e.g., textbooks) in their groups to identify and discuss various mitigation strategies for climate change. The teacher moves around, assisting groups and ensuring they find relevant information.

Pupils’ Activity: Pupils use digital devices and internet access to research and discuss mitigation strategies in their groups.

Learning Point: Mitigation strategies identification

Step 6: Practical Mitigation in Crop Production

Time: 5 minutes

Teaching Skill: Application/Discussion

Teacher’s Activity: The teacher facilitates a class discussion where groups share the mitigation strategies they found, specifically focusing on how these can be applied in crop production and horticulture in Nigeria (e.g., agroforestry, efficient irrigation, organic farming).

Pupils’ Activity: Pupils present their findings and discuss the practical application of mitigation strategies in agriculture.

Learning Point: Agricultural mitigation application

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

1. What is climate change?
2. Mention three causes of climate change.
3. Explain two ways climate change affects crop production.
4. Suggest two mitigation strategies for climate change in agriculture.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Climate change understanding

Step 8: Note-Taking

Time: 10 minutes

Teaching Skill: Guided Writing

Teacher’s Activity: The teacher guides pupils/students to copy the essential Board Summary notes on the meaning, causes, and mitigation of climate change into their notebooks.

Pupils’ Activity: Pupils/students copy the notes carefully into their notebooks.

Learning Point: Board summary recording

Step 9: Conclusion

Time: 5 minutes

Teaching Skill: Summarization/Reinforcement

Teacher’s Activity: The teacher briefly summarizes the key points of the lesson, emphasizing the importance of understanding and addressing climate change for sustainable agriculture and a healthy environment. The teacher encourages students to be advocates for climate action.

Pupils’ Activity: Pupils listen attentively and ask any final questions.

Learning Point: Lesson consolidation

Continuous Assessment/Further Study

Type: Homework/Further Reading

Instruction: Research and write a short essay (1-2 pages) on the following:

1. Identify and describe three specific impacts of climate change on a major crop grown in your local community (e.g., maize, yam, cassava).
2. Propose practical mitigation strategies that farmers in your community can adopt to reduce the effects of climate change on this crop.

Lesson Keywords

• Climate Change – Long-term shifts in temperatures and weather patterns.
• Greenhouse Gases – Gases in the atmosphere that trap heat, such as carbon dioxide and methane.
• Deforestation – The clearing of forests for other land uses.
• Mitigation – Actions taken to reduce or prevent the emission of greenhouse gases.
• Agroforestry – A land-use system that integrates trees and shrubs with crops or livestock.
• Carbon Sequestration – The process of capturing and storing atmospheric carbon dioxide.

Differentiation

For students who grasp concepts quickly, encourage them to research advanced mitigation technologies or local government policies on climate change and agriculture. For students needing more support, provide simplified diagrams and direct examples, and pair them with stronger students during group activities.

Suggested Lesson Videos

For further understanding, students can search on YouTube for:

• “Climate change causes and effects on agriculture Nigeria”
• “Mitigation strategies for climate change in farming”
• “What is climate change for students”