Posted on

Leo’s Fairphone4 Review

Beim Unboxing meines neuen Fairphone4 erwarte ich ein Smartphone, dass ich die nächsten 5 Jahre und mehr verwenden werde. Nach ein paar Tagen Nutzung und etwas Nachdenken beim Schreiben dieser Review kann ich sagen: voll zufrieden.

Ich beschreibe meine Eindrücke zu Hardware, Software, und Nachhaltigkeit. Mein Fairphone4 hab ich um 649,00 € im Fairphone Shop gekauft. Mit diesem Affiliate Link kannst du dein Fairphone4 um 25€ günstiger kaufen und ich bekomme einen 20€ Gutschein.

Continue reading “Leo’s Fairphone4 Review”
Posted on

Barefoot College

I am impressed by “barefoot college“, where women from rural areas learn how to build solar systems. Women, who often cant read, get 6 months of hands-on-training in setup and maintenance of solar systems. They learn skills nobody in their village has, their men respect them, their children see them as inspiration. The college has Ghandi’s principles as basis. Via technology review Germany., Foto: Dieter Telemans/ Panos Pictures/ Visum

Home

Posted on

Pentland Firth Underwater Turbine Tidal Green Energy Plant

The search for green energy sources motivates people to create genious solutions. Checkout the Pentland Firth sea turbine tidal power plant in construction by MeyGen.

I am happy to know that there is an effort happening to harvest this energy source.

I call it green energy as it doesn’t emit CO2. But I hesitated to call it renewable energy though, because, you know, tidal waves are powered by moon momentum, which is finally not renewable.

Question to physicists/astronomers: by slowing down tidal waves, what is the effect on moon momentum:

  1. Slowing down tidal waves reduces the strain the waves create on the moon. The moon looses less kinetic energy, it slows down less than without.
  2. Taking energy out of tides takes kinetic energy from the moon. It slows down.

But who said the sun is renewable. So I think I should stop nitpicking terms and just accept that “renewable energy” is a good layman term.