Band 6+: The diagrams below show the amount of energy lost in 100 units when it is generated from black coal and when it is generated from brown coal. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagrams compare the generation of electricity from brown coal with black coal in terms of the amount of energy lost in 100 units.

Overall, the pictures demonstrate that there are two processes causing energy loss. It is also evident that the energy generated from black coal lost less.

When the 100 units of energy produced by brown coal are transported to the power station, the energy will be reduced by 70 units, more than the loss of electricity produced by black coal. Then the remaining 30 units are moved to the high-voltage power line to transport and distribute to consumers. During the distributing process, it lost 3 units resulting in providing only 27 units for individuals.

Moving to the electricity generated by black coal, whose loss in a power station is 2 units fewer than the loss of brown coal. Then 32 units are transported and distributed to various places, which consumes 3 units. Ultimately, consumers receive 29 units of electricity.