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The graph plots energy consumption in the US from 1980 to 2020, along with a forecast to 2030. There are six different types of energy sources: Petrol and Oil, Coal, Natural Gas, Nuclear, Solar/Wind, and Hydropower. The unit of measure is a quadrillion.

Overall, Petrol and Oil are the most commonly used sources, followed by Coal and Natural gas. The other three energy sources are the least popular, and quite stable throughout the period, with Nuclear being the most used source and Hydropower the least.

The patterns of growth in Petrol and Oil and Coal are quite similar: The initial units of those fuel sources are 35 and 15 quadrillions, rising to about 40 and 20 quadrillions from 1980 to 2020, respectively. After that, they are set to continuously increase to about 48 and 28 in 2030, which are nearly 10 and 6 times higher than that of Nuclear, Solar/wind, and Hydropower.

Regards as natural gas, starting out at 20 quadrillions, the units of the source went up to 24 in 2015, though there was some volatility from 1985 to 2010. From that year, its value is expected to hit a plateau at 24 quadrillions.

The other three sources have the same starting point (about 4 quadrillions). From 1980 to 2005 they vary modestly between 3 and 5 quadrillions, and then they are anticipated to remain quite static, though there will be a slight increase in Nuclear and Solar/Wind, from 2029 to 2030.

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AlpheccaStars · Accepted Answer

The graph plots energy consumption by source in the US from 1980 to 2020, along with a forecast to 2030. There are six different types of energy sources: Petrol and Oil, Coal, Natural Gas, Nuclear, Solar/Wind, and Hydropower. ~~The unit of measure is a quadrillion.~~

(Incorrect. You do not understand this.

A unit of measur

(Incorrect. You do not understand this.

A unit of measure is something like meters ( length), hours or minutes ( time), parts per million ( concentration), degrees Centigrade (temperature) or percentage ( proportion).

For example, if there is a value of 5 meters, "5" is the quantity, and "meters" is the unit of measure.
If the value is 400 parts per million (ppm), then the quantity is 400 and the units of measure is ppm.

quadrillion is a quantity (10¹⁵), not a unit of measure.

Units for heat energy might be calories or BTUs. A calorie is the amount of energy required to raise the temperature of 1 gram of water by 1 degree centigrade. One British Thermal Unit (BTU) is the amount of energy needed to raise the temperature of one pound of water by 1 degree Fahrenheit.

The amount of energy in a barrel of oil is 5.8 x 10⁶BTUs

If these unnamed "units" were actually BTUs, then a billion barrels of oil consumed would have a measurement of 5.8 quadrillion units on this graph.

However, on this graph, the scientific name is omitted. The "units" on the Y axis are only used for equivalency and comparison. Do not write a sentence as if you knew what they in actual practice.

When you name a value on this graph, it would be X quadrillion units, where X is the quantity, e.g. 20.

)

Overall, Petrol and Oil are the most commonly used sources, followed by Coal and Natural gas. The other three energy sources are the least popular, and their usage is nearly constant ~~quite stable~~ throughout the period, with Nuclear being the most used source and Hydropower the least.

The patterns of growth in Petrol and Oil and Coal are quite similar: The initial ~~units~~ consumption values of those fuel sources are 35 and 15 quadrillion units, rising to about 40 and 20 quadrillion units from 1980 to 2020, respectively. After that, they are predicted / projected / forecast ~~set~~ to continuously increase to about 48 and 28 in 2030, which are nearly 10 and 6 times higher than that of Nuclear, Solar/wind, and Hydropower.

~~Regards as~~ Natural gas, starting out at with a usage of 20 quadrillion units, ~~the units of the source~~ went up to 24 in 2015, though there was some volatility from 1985 to 2010. From that year, its value is expected to hit a plateau at 24 quadrillion units.

The other three sources have the same starting point (about 4 quadrillion units). From 1980 to 2005 they vary modestly between 3 and 5 quadrillion units, and then they are anticipated to remain quite static, though there will be a slight increase in Nuclear and Solar/Wind, from 2029 to 2030.

Note: to avoid all the repetition of "quadrillion units", define an abbreviation in the first paragraph. Normally, the abbreviation is the first letter of the words.

You can write it with more or less words. They mean the same.

Values are given in Quadrillion Units, (hereafter abbreviated as QU).
Values are given in Quadrillion Units, (QU).

Notice how this technique dramatically improves the readability of your essay.

For example:

The graph plots energy consumption by source in the US from 1980 to 2020, along with a forecast to 2030. There are six different types of energy sources: Petrol and Oil, Coal, Natural Gas, Nuclear, Solar/Wind, and Hydropower. ~~The unit of measure is a quadrillion.~~

(Incorrect. You do not understand this.

A unit of measur

Overall, in 1980, the US consumed a total of 83 QU of energy from all sources. The present day usage (2020) is one-third higher at about 111 QU, and it projected to go up another 11% to 123 QU in 2030. The proportion that is due to Petroleum is slowly declining; it was 42% in 1980, 40% in 2020 and forecast to be 39% in 2030.

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