12-Sep-25
Agriculture and Climate Change
• Draft Report
Justina haymen
Greenhouse Gas Emissions
• global warming is a consequence of greenhouse gas emissions
• heat from the sun is trapped as gases build up in the atmosphere
• emissions have increased by 40% since 1990
• over 50 billion tonnes of greenhouse gas are emitted each year
• emissions come from a range of industry sectors and processes
• agriculture is a major contributor of greenhouse gases
Justina haymen
1
12-Sep-25
Industry sources
• the primary source of greenhouse gas emissions is electricity and heat
production - responsible for 37% worldwide
• agriculture is the second largest cause - responsible for 22% of global
emissions
• 10 countries produce more than 68% of emissions
Global emissions by economic sector
Industrial
Transportation Processes
14%
7%
Agriculture,
Forestry and
Manufacturing/C
other Land Use
onstruction
22%
9%
Buildings
7%
Waste
4%
Electricity/Heat
Production
37% Justina haymen
Consequences of global warming
• increased frequency of extreme weather events including:
- torrential rains
- floods
- heatwaves
- droughts
- storms
• average temperatures predicted to rise by 1.5ºC by 2050
• global sea levels rise as glaciers retreat and ice sheets melt
• more land at risk of coastal flooding
Justina haymen
2
12-Sep-25
Effects on agriculture
• higher CO2 levels affect crop yields and nutritional value
• extreme temperatures can prevent crops from growing
• torrential rains, floods and droughts can harm crops and reduce yields
• rising sea levels may result in loss of agricultural land
• increased migration of invasive pests that damage crops
• global crop yields could decline by up to 30% by 2050
Justina haymen
Challenges ahead
• greenhouse gases now far exceed safe levels
• extreme weather events will impact crop production
• natural resources need to be protected
• more resilient crop varieties are needed
• protecting carbon sinks is essential for keeping the climate stable
• food insecurity set to become a global issue
• the world will need to produce 70% more food by 2050 to feed an
estimated 9 billion people
Justina haymen
