Fig. 6.1 shows the total mass of plastics waste produced in the world since 2000 and what happens to that plastic. The data from 2020 to 2050 are predictions and are shown as dashed lines on Fig. 6.1. Fig. 6.1 Using the information in Fig. 6.1, describe the data for the total plastics waste production from 2000 to 2050. ....................................................................................................................................... . ....................................................................................................................................... . ....................................................................................................................................... . ....................................................................................................................................... . ................................................................................................................................. (ii) Using the information in Fig. 6.1, estimate the percentage of total plastics waste that will be discarded in 2050. Circle the correct percentage. (iii) Many plastics are made from oil. Oil is not a sustainable resource. Describe what is meant by the term sustainable resource. ....................................................................................................................................... . ....................................................................................................................................... . ....................................................................................................................................... . ....................................................................................................................................... . ................................................................................................................................. (iv) The combustion of plastics releases carbon dioxide gas into the atmosphere. Describe the consequences of releasing this carbon dioxide gas into the atmosphere. ....................................................................................................................................... . ....................................................................................................................................... . ....................................................................................................................................... . ....................................................................................................................................... . ....................................................................................................................................... . ....................................................................................................................................... . .................................................................................................................................

Biology

IGCSE&ALevel

CAIE

Exam No：0610_m24_qp_32 Year：2024 Question No：6(a)

Answer:

Knowledge points:

21.1.1 State how modern technology has resulted in increased food production in terms of: – agricultural machinery to use larger areas of land and improve efficiency – chemical fertilisers to improve yields – insecticides to improve quality and yield – herbicides to reduce competition with weeds – selective breeding to improve production by crop plants and livestock, e.g. cattle, fish and poultry

21.1.2 Describe the negative impacts to an ecosystem of large-scale monocultures of crop plants

21.1.3 Describe the negative impacts to an ecosystem of intensive livestock production

21.1.4 Discuss the advantages and disadvantages of genetically modifying crops, such as soya, maize and rice

21.1.5 Discuss the social, environmental and economic implications of providing sufficient food for an increasing human global population

21.1.6 Discuss the problems which contribute to famine including unequal distribution of food, drought and flooding, increasing population and poverty

Answer:

Knowledge points:

Solution:

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