The Washington, D.C., area is a hotbed for power.

With more than 1.2 million households, it’s the fourth-largest power hub in the country, behind California, Texas and New York.

In the past year, more than 10 million people have moved from the region.

But the city also has an increasingly complex energy system, and that means more than a quarter of its power comes from coal.

This week, the U.S. Energy Information Administration released its annual Energy Outlook for 2017.

It predicts that by 2025, the country will use more than 35% of its electricity from coal, down from more than 40% last year.

The outlook for 2018 calls for a slight increase in coal use, as more of it is replaced by natural gas.

That’s an important change, because natural gas is a cleaner fuel than coal, but it will likely make up for the lack of solar and wind.

In 2018, the report projects, the share of electricity produced by natural-gas-fired power plants will rise from 5.1% to 6.6%, as new power plants, such as the Marcellus shale, will add power capacity.

The EIA expects that as more natural gas-fired plants come online, the total number of power plants that will be coal-fired will decrease.

But that won’t be the case for the next three years, because the EIA doesn’t expect the use of natural gas to be any higher than it was in 2018.

As natural gas prices drop, it could make more sense for utilities to turn to other sources of power.

The report projects that the number of electricity plants that are currently coal- or natural- gas-fueled will drop from 7.6% to 4.7%, as power-plant owners are expected to shift toward solar and other forms of renewable energy.

This shift, along with the growth of wind and solar power, will create more opportunities for utility companies to build out new coal- and natural-solar power plants.

As more coal-burning power plants are built, the EPA expects the coal share of the electricity supply to decline to less than 1% in 2030.

In 2020, it expects the share to fall to just under 2%.

By 2030, coal-fuel use is projected to drop to just over 2%, as solar and renewable energy are more prevalent.

But by 2040, the number that will use coal is expected to rise to over 7%, as utilities have to replace older plants with new ones.

By 2045, it will be more than 20%, with about half of that coming from the coal sector.

Coal-fired generation is projected in the EEA report to drop from 17.5% in 2020 to just 2.9% in 2040.

The decline is attributed largely to the continued use of older plants.

Coal will account for the remaining 1.3% of power generation by 2045.

The coal industry is expected in 2020 and 2040 to have nearly half of its production from coal plants.

But as more and more coal plants are retired or shuttered, the market will shift toward natural gas and other renewables, the company said.

By 2030 and 2045 the share that will rely on coal will drop to 3.4% and 2.7% respectively.

That is a change that could have dramatic impacts on the coal industry.

Coal is a major contributor to carbon emissions, but as natural gas, renewables and other sources become more prevalent, coal will be a primary source of electricity generation.

The Environmental Protection Agency estimates that coal-to-gas power plants alone will add more than 3 million tons of carbon dioxide to the atmosphere each year through 2030.

By 2050, the emissions will grow to 4 million tons per year.