One of the main objectives of a sustainable development and circular economy is the recycling of by-products generated in industrial and agricultural production processes. One of the possible solution is the use of such by-product materials in the synthesis of environmental adsorbents.

Blockchain technology promises to improve the efficiency, transparency, and accountability of humanitarian operations.

Microplastic (MP) and nanoplastic (NP) pollution is among the global environmental concerns of the 21st century owing to its transboundary distribution and persistence.

Global warming and climate change caused by an ever-increasing accumulation of atmospheric CO2 are reaching alarming levels.

Energy production and CO2 emissions are strictly connected.

Hydrogen as a clean, reliable and potentially sustainable energy vector has attracted growing interest for promoting the sustainable development of both industry and society worldwide.

This article supports SDG 9, 14 and 15 by looking at how to create sustainable infrastructure with the help of examples from nature.

This opinion article is the result of intensive discussions between a group of more than fifty internationally renowned researchers who are scientifically engaged in thermofluids and energy process engineering. With this article we express our plea: Let us consider all options and explore new ideas that will move us towards a climate-neutral energy system!