| Date | November 2017 | Marks available | 3 | Reference code | 17N.3.HL.TZ0.16 |
| Level | Higher level | Paper | Paper 3 | Time zone | TZ0 |
| Command term | Outline | Question number | 16 | Adapted from | N/A |
Question
Outline three issues arising from the release of pollutants into the environment.
Markscheme
a. reduction in biodiversity
b. biomagnification occurs
c. change in abiotic conditions
eg: loss of soil quality/loss of ozone layer
d. global warming
eg: methane, acid rain, climate change
e. community changes
eg: increase in pest species
f. health hazards/mutations
eg: animals choking on plastic, cancer, etc
g. other valid issue
eg: poisoning from toxins/pollutants
[Max 3 Marks]
Examiners report
[N/A]
Syllabus sections
Option C: Ecology and conservation » Option C: Ecology and conservation (Core topics) » C.3 Impacts of humans on ecosystems
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