The presented pie chart shows raw materials and their total units for electricity production in France and Australia in two varied years, 1980 and 2000. In general, we can immediately observe that total production of electricity in 2000 was around twice as it was in 1980, in both countries. However, the amount of main raw materials differed by year and country.
As presented in a pie chart, the main source material for Australia was coal which was half of the total production of electricity in 1980, and another half of total production contained natural gas (20 units), hydro power (20 units), oil (10 units). After 20 years, a dramatic change in the number of units was viewed where coal usage showed a substantial increase from 50 to 130. Moreover, the oil and natural gas units were presented a rapid decrease to 2 units for both.
In contrast with Australia, there were 5 different sources for electrical manufacturing in France. Although in 1980 materials were consisted of different proportions of total production, the significant part of the production was nuclear power in 2000. Furthermore, oil and coal were also taken the same amount of proportion with 25 units respectively. 
The presented pie chart  
shows
 raw  
materials
 and their  
total
  units
 for electricity  
production
 in France and Australia in two varied years, 1980 and 2000.  
In general
, we can immediately observe that  
total
  production
 of electricity in 2000 was around twice as it was in 1980, in both countries.  
However
, the amount of main raw  
materials
 differed by year and country.
As presented in a pie chart, the main source  
material
 for Australia was coal which was half of the  
total
  production
 of electricity in 1980, and another half of  
total
  production
 contained natural gas (20  
units)
,  
hydro power
 (20  
units)
, oil (10  
units)
. After 20 years, a dramatic  
change
 in the number of  
units
  was viewed
 where coal usage  
showed
 a substantial increase from 50 to 130.  
Moreover
, the oil and natural gas  
units
  were presented
 a rapid decrease to 2  
units
 for both. 
In contrast
 with Australia, there were 5  
different
 sources for electrical manufacturing in France. Although in 1980  
materials
  were consisted
 of  
different
 proportions of  
total
  production
, the significant part of the  
production
 was nuclear power in 2000.  
Furthermore
, oil and coal were  
also
 taken the same amount of proportion with 25  
units
  respectively
.