Examine the chart above which shows the consumption of renewable energy in the European Union (EU) in 2011 and answer each of the following questions - Leaving Cert Geography - Question 12 - 2014

To calculate X, we first note that the total renewable energy consumption adds up to 100%. The known percentages are:

• Hydro power: 68%
• Wind power: 9.1%
• Geothermal energy: 3.6%
• Biomass: 20.2%

Adding the known percentages: $68 + 9.1 + 3.6 + 20.2 = 100.0$ Thus, the value for X (solar energy) is simply 0% as the total adds up to 100% without any room for solar energy.

The percentage of biomass generated from wood and wood waste (B) can be deduced from the data provided. In the chart, the total biomass percentage is noted as 20.2%. Since it is specified that B refers to the fraction from wood and wood waste, we can take this value directly as it was not further divided in the data.

Geothermal energy refers to heat energy that is generated and stored in the Earth. This energy originates from the formation of the planet and from radioactive decay of materials within the Earth. It can be harnessed for various uses, such as heating and electricity generation, by tapping into geothermal reservoirs.