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Current issue

ELEKTRO 7/2021 was released on October 1st 2021. Its digital version will be available on November 1st 2021.

Topic: Power engineering; Electricity quality; Renewable Energy

Main article
Local specifics of South-Bohemian region regarding usage of alternative fuel cars

SVĚTLO (Light) 4-5/2021 was released 9.17.2021. Its digital version will be available 9.17.2021.

Lighting installations
Lighting reconstruction of underpass and platforms of Ústí nad Orlicí railway station

Public lighting
The lighting of park at Episcopal Residence of Ostrava-Opava in Ostrava
Outdoor lighting systems and intrusive light
Generel of public lighting 9th part
Environmental viewpoint

Princeton chemists discover a key to greener food production

2. 8. 2021 | Princeton University | www.princeton.edu

Arguably the most important (if least well known) industrial advancement of the 20th century, the Haber-Bosch ammonia synthesis process essentially conquered food scarcity by creating the means to mass produce fertilizer — fertilizer then used to fortify food harvests around the world.

But the production of ammonia — the building block for ammonium nitrate fertilizer — generates a problematic byproduct down the line: carbon dioxide. Lots of it: more than two tons of carbon for every ton of fertilizer. It accounts for an estimated 1.4% of global carbon dioxide emissions. So, while the process countered mass starvation, it also began ratcheting up the planet’s burden of greenhouse gases.

Mass production of food without carbon dioxide

One of the main goals before scientists today is de-coupling food production from carbon. In part, this means finding a way to produce fertilizer through carbon-free ammonia synthesis. Can it be done without Haber-Bosch? The lab’s proof-of-concept paper lays out a simple method that involves shining blue light on an iridium catalyst to enable the formation of weak bonds at or near thermodynamic potential — that is, with no massive outlays of energy — without a carbon byproduct.

Read more at Princeton University

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