Bogus anti-solar claims exposed

From This is Not Cool (formerly Climate Denial Crock of the week, or as I called it, ClimateCrocks)

Great new resource from Columbia University – Rebutting Claims about Solar, Wind, and Electric Vehicles. Of course, I’ve been doing this for some time, but it’s great to have a resource like this bookmarked.

There are takedowns for 33 common claims, I’ll post a few every day or so. By all means bookmark the original document – where all the assertions of fact are footnoted.

Columbia University:

False Claim #1: Electromagnetic fields from solar farms are harmful to human health.

“The EMF (electromagnetic field) from solar farms poses serious health risks especially to those who have electromagnetic hypersensitivity.”

The electromagnetic fields generated at a solar farm are similar in strength and frequency to those of toaster ovens and other household appliances—and harmless to humans. A detailed analysis from North Carolina State University concluded that there is “no conclusive and consistent evidence” of “negative health impact[s] from the EMF [electromagnetic fields]
produced in a solar farm.”

EMF exposure levels vary according to the EMF source, proximity to the source, and duration of the exposure. On a solar farm, EMFs are highest around electrical equipment such as inverters. However, even when standing next to the very largest inverter at a utility-scale solar farm, one’s exposure level (up to 1,050 milligauss, or mG) is less than one’s exposure level while operating an electric can opener (up to 1,500 mG), and well within accepted exposure limits (up to 2,000 mG).

When standing just nine feet from a residential inverter, or 150 feet from a utility-scale inverter, one’s exposure drops to “very low levels of 0.5 mG or less, and in many cases . . . less than background levels (0.2 mG).”33 For comparison, a typical American’s average background exposure level is 1mG, reaching 6 mG when standing three feet from a refrigerator, and 50 mG when standing three feet from a microwave.

The electromagnetic fields present on a solar farm constitute “non-ionizing radiation,” which, by definition, generates “enough energy to move atoms in a molecule around (experienced as heat), but not enough energy to remove electrons from an atom or molecule (ionize) or to damage DNA.”

In addition, EMFs are extremely low in frequency, which means
they contain “less energy than other commonly encountered types of non-ionizing radiation like radio waves, infrared  radiation, and visible light.”

False Claim #2: Toxic heavy metals, such as lead and cadmium, leach out from solar panels and pose a threat to human health.

Roughly 40% of new solar panels in the United States and 5% of new solar panels in the world contain cadmium, but this cadmium is in the form of cadmium telluride, which is non-volatile, non-soluble in water, and has 1/100th the toxicity of free cadmium.

Most solar panels, like many electronics, contain small amounts of lead.40 However, the Massachusetts Department of Energy Resources (DER) has assessed that “because PV panel materials are enclosed, and don’t mix with water or vaporize into the air, there is little, if any, risk of chemical releases to the environment during normal use.”

The Massachusetts DER has further assessed that, even in the unlikely event of panel breakage, releases of chemicals used in solar panels are “not a concern.”

All materials in a solar panel are “insoluble and non-volatile at ambient conditions,” and “don’t mix with water or vaporize into air.”

Moreover, they are encased in tempered glass that not only withstands high temperatures, but is also strong enough to pass hail tests and is regularly installed in Arctic and Antarctic conditions. It is theoretically possible that, when exposed to extremely high heat exceeding that of a typical residential fire, panels “could emit vapors and particulates from PV panel components to the air.” But that risk is limited by the fact that “the silicon and other chemicals that comprise the solar panel would likely bind to the glass that covers the PV cells and be retained there.” 

When a cadmium telluride panel is exposed to fire of an intensity sufficient to melt the glass on the panel, “over 99.9% of the cadmium [is encapsulated in] the molten glass.”

Furthermore, a 2013 analysis found that, even in the worst-case scenarios of earthquakes, fires, and floods, “it is unlikely that the [cadmium] concentrations in air and sea water will exceed the environmental regulation values.”