The pie charts compare the sources of Australia in 2008 and expectations for 2030.
Overall
,Linking Words
it is clear that
 the Linking Words
percentage
 of gas and oil Use synonyms
were 
Unnecessary verb
apply
incresed
 in the past,Correct your spelling
increased
while
,coal will Linking Words
have decreased
 in the future.
As the charts show,the main energy Wrong verb form
decrease
source
 was coal at 39,00% in 2008,Use synonyms
while
 the smallest was hydro at 0.20%.Linking Words
Moreover
,the Linking Words
source
 of solar was as twice high at 0.80% Use synonyms
than
 Change preposition
as
wind
 which Add an article
the wind
estimated
 at 0.30%.Add a missing verb
was estimated
However
,the Linking Words
source
 of the gas was just 22.90% and oil had approximately the same per cent at 32.50%.The other sources were at 4.30%.Turning to the energy Use synonyms
source
 of 2030,the Use synonyms
percentage
 of coal is predicted to Use synonyms
get
 22.30 % Verb problem
be
while
 oils will be at around 35.50%.The forecast shows thatLinking Words
,
 the quantity of gas will be 32.00% and 0.70% for hydro.It is estimated the Remove the comma
apply
percentage
 of geothermal and others will stay at the same Use synonyms
percentage
 4.30%,respectively.By 2030,the Use synonyms
percentage
 of wind will be at around 0.90%.Use synonyms