The line graph illustrates the energy consumption trends in Country A from 2000 to 2020, along with predictions for the future up to 2050.
Overall, the graph highlights a significant upward trend in fossil fuel consumption, while the use of renewable energy remained relatively stable throughout the period. However, future projections indicate a decline in the usage of hydropower and natural gas.
Regarding non-renewable energy sources, petroleum and oil consumption started at 35 quadrillion units but dramatically decreased to 5 quadrillion units over the first five years until 2005. A similar trend is observed with natural gas, which began at 20 quadrillion units. Subsequently, petroleum and oil consumption experienced a substantial increase, rising to 40 quadrillion units by 2020 and continuing to grow steadily to nearly 50 quadrillion units by 2050. Coal consumption also doubled during this period, increasing from 15 to 30 quadrillion units. In contrast, natural gas consumption exhibited fluctuations throughout the timeframe, while nuclear power rose slightly from 3 to 7 quadrillion units, remaining the lowest among non-renewable energy sources.
In terms of renewable energy, there was a noticeable, albeit slight, change and competitive pattern between solar/wind and hydropower. Both started at 4 quadrillion units with similar data, experiencing different forms of fluctuations until 2030. At that point, solar/wind energy surpassed hydropower, reaching 6 quadrillion units by the end of the period, while hydropower returned to its previous levels.