• 11 Posts
  • 310 Comments
Joined 3 years ago
cake
Cake day: March 2nd, 2023

help-circle




  • This may sounds crazy but hear me out: planting gardens in the ground, putting solar panels on roofs, not the other way around.

    The articles does mention another option:

    growing crops under solar panels, a burgeoning field known as rooftop agrivoltaics

    That sounds interesting. I hope the cost is going to be studied. Growing vertically and on rooftop can be worse in some ways. More energy intensive if there’s a need for irrigation that requires more pumps to bring extra water to rooftop. More material intensive if the weight of soil require more concrete and steel so the building can support it.






  • Thanks. This explain why cruise ships are much more wasteful than ferries:

    perhaps the biggest difference is the payload. […] The reason, of course, is that a cruise ship is a floating village, with shops, restaurants, swimming pools and the like

    This is why it’s important to compare transportation mode all things being equal. Keep in mind there’s lot of people flying coach, very few planes with individual cabins and restaurants. Cruise ships are designed for entertainment and luxury. Ferries are designed for transportation.








  • Averages are affected a lot by outliers with very large values, and the effect is larger when there’s large inequalities. If measuring by income or wealth (higher is better) in a stadium with 1 billionaire and 999 homeless people, the average people is millionnaire.

    This study still uses averages and flips the effect with a povery score (higher is worse). It gives more weight to the other end of a spectrum, very poor persons that need 300min to win 1$ makes the average much higher.

    Using median values, or better 20-80 centiles values would be more meaningful.