Feeding The World

Question 1

What is sustainable food production?

Answer 1

Sustainable food production is producing food in ways that can be continued indefinitely

Question 2

Why is there a reduction is the population of some fish species?

Answer 2

Fish are a valuable source of protein and overfishing has caused a decrease in population in some species.
These fish populations cannot regenerate therefore will not provide us in the future

Question 3

What are international org and regulations doing to control overfishing?

Answer 3

• international organisation have introduced fishing restrictions and limitations tag limit the number and types of fishes caught in an area.
• the aim to allow enough fish to survive and reproduce to maintain their population
• regulations on mesh size of nets allow small young fish to escape

Question 4

What is fish farming?

Answer 4

Fish can be farmed by being bred and reared in large cages in the sea or rivers.
+ protects the fish from predators and makes them easier to catch and allows wild population to recover
- fish are kept close to each other so disease spreads quickly and risk of it spreading to the wild population

Question 5

How can farmers reduce the use of fertilisers and pesticide in sustainable farming?

Answer 5

• instead of using artificial fertilisers, replace soil nutrition through using manure
• as different crops take different nutrients from soil, crop rotation (planting different crops each year) gives soil a chance to recover
• this maximises plant growth and prevent growth of particular crop pests
• using the pests’ natural predators, farmers use biological control to decrease pest population
• gene techn making plants resistent to pests and diseases

Question 6

What is a hydroponic system?

Answer 6

• when plants are grown in water containing dissolved minerals
• commercial growers use this as it enables plant to grow quickly