(a(i))[1]
From the data in Fig. 5.1, state the five-year period that has the biggest rise in rice production.
(a(ii))[3]
Using Fig. 5.1, calculate the percentage rise in rice production from 1960 to 1990. Give your response to the nearest whole number.
(b)[3]
State three methods humans use to raise crop plant production.
(c(i))[3]
Describe the benefits of intensive livestock farming.
(c(ii))[2]
State two effects of untreated sewage on aquatic ecosystems.