We rewrote this page. The old version leaned on disputed re-analyses of epidemiological cohorts and industry-affiliated articles; this one uses primary sources instead: US EPA data, the World Health Organization, the IARC Monographs programme, and peer-reviewed studies. Bracketed numbers point to the list at the bottom.

Claim 1: “Modern coal power generates very small quantities of these emissions — at the same healthy levels generated by other industries and sometimes by nature.”

The facts: The first half holds up; the second doesn’t. US power-sector pollution has fallen a lot: EPA monitoring shows SO2 concentrations have decreased substantially over the years [1], and under the Mercury and Air Toxics Standards, sector mercury emissions dropped 86% by 2017 (to roughly 4 tons), with acid-gas hazardous air pollutants down 96%. [2] The original page was right about that trend, and it deserves credit for saying so.

“Healthy levels,” though, is a claim neither EPA nor WHO will make. Coal combustion remains the largest single source of sulfur dioxide (SO2) emissions in the United States and the second-largest source of nitrogen oxides (NOX), which together form fine particulate matter. [3] And the benchmark for exposure is the WHO air quality guideline, which 99% of the world’s population was not meeting in 2019. [4] EPA’s own page is explicit that it sets its SO2 standard “at levels that are safe for public health and the environment.” [1]

Claim 2: “At today’s low emissions levels there is no demonstrated causation between coal-related emissions and asthma, heart disease, emphysema, or cancer.”

The facts: Causation is established, for outdoor air pollution broadly and for its particulate matter specifically. In 2013, an IARC Monographs Working Group reviewed more than 1,000 scientific studies and classified outdoor air pollution as carcinogenic to humans (Group 1), with sufficient evidence for lung cancer; particulate matter was evaluated separately and got the same classification. [5] The WHO’s estimate is that ambient air pollution alone caused 4.2 million premature deaths in 2019, mortality “due to exposure to fine particulate matter, which causes cardiovascular and respiratory disease, and cancers”: about 68% of those deaths from ischaemic heart disease and stroke, 14% from COPD (chronic obstructive pulmonary disease), 14% from acute lower respiratory infections, and 4% from lung cancer. [4] That isn’t one contested cohort study; it’s the evidence base behind every major regulator’s PM standard.

One specific pollutant deserves its own mention. Mercury is a potent neurotoxin, and coal-fired power plants have historically been the single largest US source of manmade mercury emissions to the air — about 44 percent of the total [6]; that’s one reason EPA’s MATS rule targeted it specifically. [2]

Claim 3: “It is dishonest to only look for negative health impacts of coal, and ignore the vital positive impacts on health that we get from reliable, affordable energy.”

The facts: This is the strongest point in the original page, and it should be taken seriously. Reliable electricity underpins hospitals and laboratories, keeps food and medicine in working refrigeration chains, and powers the heating, cooling, and clean-cooking options that are themselves health interventions. The WHO lists “ensuring access to affordable clean household energy solutions for cooking, heating and lighting” and “increased use of low-emissions fuels and renewable combustion-free power sources (like solar, wind or hydropower)” among its key policies for reducing outdoor air pollution. In other words, the medical establishment treats clean energy access as a public-health tool. [4]

But “energy has health benefits” doesn’t get you to “coal is therefore good for health,” because the benefits are source-agnostic. They come from reliable, affordable electricity, and coal’s health costs (PM, SO2, mercury, CO2) stay attached to the fuel while new low-carbon capacity keeps getting cheaper. New utility-scale solar (USD 0.044/kWh) and onshore wind (USD 0.033/kWh) are now both below the weighted average fossil-fired cost globally, so there’s no trade-off forcing a choice between “cheap coal” and “expensive clean power.” [7]

Assessing the benefits: what reliable energy does for human health — fairly stated.

To weigh coal’s net health impact, you have to look at both sides, with numbers that actually hold up.

• The benefits are real. Cheap, reliable electricity enables hospitals, data centers, laboratories, pharmaceutical manufacturing, food refrigeration, and air conditioning; the original page correctly identifies this as health-relevant infrastructure. Any energy policy that degrades grid reliability hurts people first. [4]
• The costs are measured. Ambient PM2.5 alone killed an estimated 4.2 million people in 2019, more than any other environmental risk; coal plants remain the US’s largest single source of SO2 and a major contributor to PM-forming pollutants, and coal has historically been the single largest US source of airborne mercury. [4] [3] [6]
• The trend is real too: US power-sector emissions have fallen dramatically under regulation, SO2 down substantially over decades of monitoring [1] and sector mercury down 86% by 2017. [2] That’s evidence rules work, not that the pollutants are harmless.
• And the deciding factor is now price: new solar and wind undercut fossil-fired costs globally (56% and 67% below the weighted average), which means the health benefits of affordable electricity can be delivered with fewer pollutants attached. [7]

The best policy?

Keep grids reliable and bills low; those are health outcomes worth protecting. But judge each fuel on its full record. Coal’s legacy of cheap cooking displacement and grid service is real, and so are the 4.2 million annual ambient-air-pollution deaths [4] and the documented carcinogenicity of the particulates coal plants still emit [5]. With solar now cheaper than fossil-fuel power in most markets [7], “affordable energy” no longer means choosing coal over cleaner air.