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QUESTION 19 (6 marks) This question refers to Stimulus 4 in the stimulus book. a) Contrast the data to draw a conclusion about the potential to maintain a sustainable ecological footprint by using hydroponic systems to grow agricultural crops instead of conventional methods. b) Determine a method to reduce the ecological footprint associated with using hydroponic systems for agricultural production. Describe your reasoning. [4 marks] [2 marks]
QUESTION 9 The principles of ecologically sustainable development support (A) extracting water from a river system 1f environmental flows are maintained. (B) using native forests and hardwood plantations to produce wood products. (C) using steel rather than timber in all new housing developments. (D) importing fish from overseas to conserve local fish stocks.
QUESTION 21 (7 marks) a) Describe the concept of an ecological footprint and state its unit of measure. [2 marks] b) Identify an example of a biological resource and four factors that would be considered when calculating its ecological footprint. [5 marks]
QUESTION 4 (9 marks) a) Using an example explain the concept of an ecological footprint. [3 marks] b) Using a case study discuss positive and negative human influences on the sustainability of ecosystems at local regional and global scales. [6 marks] Case study:
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