Read the sentences in ex. 6 again and put the ideas in order of importance. Justify your ranking and write down your reasons.
a) Green areas which already exist in cities should be preserved
b) The local government should incorporate tree planting into urban development plans.
c) Schools should be committed to educating children about the importance of keeping urban areas green.
d) Cities should sustain themselves with renewable energy.
e) Citizens should recognise the importance of using public transport.
f) The local government should help people uncover the benefits of urban green areas, e.g. by organising community events in parks.
g) The local government should work in concert with the national authorities.