P2U2 08Climate Change and Agriculture

Why is increased carbon dioxide beneficial for plants?

• It helps plants to grow faster and produce more oxygen.

• It is essential for plant growth due to the burning of fossil fuels.

• It reduces the need for water in plants.

• It increases the acidity of the soil, which is good for all plants.

What are the potential benefits of longer growing seasons due to global warming?

• Increased farming opportunities in colder high latitudes like northern Canada as winters become shorter and milder.

• Decreased agricultural productivity in tropical regions due to heat stress.

• Increased risk of crop diseases and pests due to warmer temperatures.

• Shorter growing seasons leading to reduced food supply.

What is the effect of warmer temperatures on pests and diseases?

• Warmer temperatures can reduce the range of pests and diseases.

• Warmer temperatures can expand the range of pests and diseases, such as the spread of sleeping sickness by tropical flies in Africa.

• Warmer temperatures have no effect on pests and diseases.

• Warmer temperatures can eliminate pests and diseases entirely.

How does water loss impact irrigation?

• Higher evaporation due to warmer temperatures leads to more intense droughts, reducing river levels and impacting irrigation, as seen with the Colorado River.

• Water loss has no significant effect on irrigation practices.

• Increased water loss improves irrigation efficiency by concentrating water resources.

• Water loss only affects agricultural crops, not irrigation systems.

How could warmer temperatures benefit livestock farming?

• By increasing the number of livestock that can be raised in warmer climates.

• By reducing freezing weather deaths and saving on heating costs for barns.

• By allowing farmers to grow more crops alongside livestock.

• By improving the quality of animal feed available.

What are the major challenges to agriculture caused by soil erosion and desertification?

• Long droughts and overgrazing destroy plant cover, leading to soil erosion and desertification, particularly in semi-arid regions like the Sahel in Africa.

• Excessive rainfall and flooding improve soil fertility and prevent erosion.

• Increased use of chemical fertilizers enhances plant growth and prevents desertification.

• Urbanization and industrial development create more arable land for agriculture.

How does climate change impact crop production regionally?

• Crop production is likely to increase in warmer areas but decrease in colder regions.

• Crop production is likely to remain unchanged across all regions.

• Crop production is likely to increase in colder areas but decrease in warmer and drier regions.

• Crop production is likely to decrease in all regions due to climate change.

What is the current impact of climate change on agriculture according to the IPCC?

• Climate change is already affecting food and farming.

• Climate change has no impact on agriculture.

• Agriculture is thriving due to climate change.

• Climate change is only affecting livestock.

How do rising sea levels threaten agriculture?

• They can flood coastal floodplains, damaging crops like rice and making the soil less suitable for farming.

• They increase the amount of arable land available for farming.

• They lead to more rainfall, which benefits crop growth.

• They reduce the need for irrigation in agricultural practices.