The planet is dimming…

in many ways, none of them good from a population and climate perspective.

Earthshine eg. image 1 by Ben Laken via Flickr CC

Let’s skip a discourse on the current quality of general human intelligence because that seems too easy and depressing, even though human stupidity and inaction in the face of overwhelming evidence has created the climate crisis.

Now there is evidence the Earth is dimming due to climate change. According to a report in EarthSky, the American Geophysical Union (AGU) last month said that Earth’s warming oceans are causing fewer bright clouds to reflect sunlight back into space. So we are not shining so brightly in the universe, and more heat is reaching the Earth’s surface. This additional heat will, presumably, lead to even warmer oceans, according to the article. “This result is contrary to what many scientists had hoped. They’d hoped a warmer Earth might lead to more bright clouds and higher albedo (greater reflectivity), and more heat reflected away.” That outcome would have helped to moderate warming and balance the climate system, but the AGU result shows the opposite is true. The new Earth-albedo study was published in the peer-reviewed AGU journal Geophysical Research Letters.

Earthshine is what happens when sunlight bounces from Earth onto the night landscape of the moon. It’s that dim glow you sometimes see on the darkened portion of a crescent moon. The Big Bear Solar Observatory in Southern California gathered the earthshine data from 1998 to 2017. The scientists said the Earth is now reflecting about half a watt less light per square meter than it was 20 years ago. Most of the drop has occurred in the last three years of earthshine data.


Meanwhile on the “let’s do something” climate crisis front, the Environmental Protection Agency finalized its first new climate rule last month, slashing the use of powerful greenhouse gases widely used in home refrigerators and air conditioners and often found to be leaking from U.S. supermarket freezers.

The final rule establishes a comprehensive program to cap and phase down the production and consumption of climate-damaging hydrofluorocarbons (HFCs) in the United States, the EPA said on 23 September. “HFCs are potent greenhouse gases commonly used in refrigeration and air conditioning equipment, as well as foams and many other applications. A global phasedown of HFCs is expected to avoid up to 0.5 °C of global warming by 2100. This final rule will phase down the U.S. production and consumption of HFCs by 85% over the next 15 years, as mandated by the American Innovation and Manufacturing (AIM) Act that was enacted in December 2020.”

For more information on this rule, visit:

We’re racing against the clock as the lights go out.