8 (b) A new road is being built through one part of Chiapas State, because oil has been
discovered. Conservationists think that the oil should not be extracted and the road
Should not be built. The effects on plant diversity have already been recorded after road
building in a similar location. The same sample areas were visited each year before and
after the road was built.
Before road built
After road built
1987
1988
1989
1990
1991
1992
Number of
types
Trees
36
34
35
32
30
27
Herbs
18
20
21
19
18
19
Plot the data in the form of a graph.