A reliable indicator of the air quality in offices, classrooms, or living rooms is the CO2 content. In fresh air, the concentration of carbon dioxide is around 400 ppm. This stands for “parts per ...
This year is the halfway point in the implementation of the 2030 Agenda for Sustainable Development. A global pandemic, conflicts, disasters and other crises have set back progress towards the ...
Before the Raspberry Pi came out, one cheap and easy way to get GPIO on a computer with a real operating system was to ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback