Scientific Authority and Media Visibility of Climate Change Scientists and Contrarians

“We juxtapose 386 prominent contrarians with 386 expert scientists by tracking their digital footprints across ∼200,000 research publications and ∼100,000 English-language digital and print media articles on climate change. Projecting these individuals across the same backdrop facilitates quantifying disparities in media visibility and scientific authority, and identifying organization patterns within their association networks.”

“Here we show via direct comparison that contrarians are featured in 49% more media articles than scientists. Yet when comparing visibility in mainstream media sources only, we observe just a 1% excess visibility, which objectively demonstrates the crowding out of professional mainstream sources by the proliferation of new media sources, many of which contribute to the production and consumption of climate change disinformation at scale.”

Source: Petersen, Alexander Michael, Emmanuel M. Vincent, and Anthony LeRoy Westerling. “Discrepancy in scientific authority and media visibility of climate change scientists and contrarians.” Nature communications 10.1 (2019): 1-14. Thanks to Julie Molinié.

Making a Cooling Chamber for Tomatoes

When you pick your tomatoes, if you want to keep them longer, you have to find a way of reducing the temperature. As availability of electricity at village level can be a problem, ways have to be found to lower the temperature of this fragile crop. Some farmers at Dambatta in Kano State, Nigeria have used local mud bricks to make a very effective cooling chamber. Watch the video at AccessAgriculture. Via Practical Action.

Tech Talks

Last week, I spoke at The Conference in Malmö, Sweden, where I saw quite some interesting tech talks. The super-efficient Swedes have already uploaded them, so I present you some of my favorites:

Next week, I’m doing a talk in Paris. Knowing the French a bit, these videos will never be uploaded, so be there.

Off-Grid, Solar-Powered, Zero-Battery Refrigerator

Joey Hess has designed, built and tested an off-grid, solar powered fridge, with no battery bank. Using an inexpensive chest freezer with a few modifications, the fridge retains cold overnight and through rainy periods. The set-up consists of a standard chest freezer, an added thermal mass, an inverter, and computer control. He writes: [Read more…]

Foaming of Recyclable Clays into Low-Cost Thermal Insulators

“Thermal insulators are crucial to reduce the high energy demands and greenhouse emissions in the construction sector. However, the fabrication of insulating materials that are cost-effective, fire resistant, and environmental-friendly remains a major challenge. In this work, we present a room-temperature processing route to fabricate porous insulators using foams made from recyclable clays that can be locally resourced at very low costs.”

Read more: Minas, Clara, et al. “Foaming of Recyclable Clays into Energy-Efficient Low-Cost Thermal Insulators.” ACS Sustainable Chemistry & Engineering (2019).

Amish Hand-Demolish Building in Tennessee

Who to call when you need your building “hand-demolished”? To the general public, “Amish” often equates to handcrafted – meaning hand-milked cows, handmade quilts, hand-built furniture, and the like (whether that perception is always accurate is another question).

And in that spirit, one Tennessee city found that an Amish hands-on approach was exactly what they needed to remove a historic structure. The Clarksville Leaf-Chronicle reports that an Amish crew of workers has been deconstructing the city’s 140-year-old Hodgson/Dabbs building, brick-by-brick.

Read more: Amish Hand-Demolish Building in Tennessee, Amish America, June 27, 2019. Image by Henry Taylor for the Leaf Chronicle.