Get garbage not to smell

The first biogas conversion plant in Argentina was just opened in Rosario. Regrettably, I have no pictures of this lovely place, but suffice to say that the plant is installed on top of a landfill in the southern limit of the city, and it transforms methane, produced by the decay of organic matter, into carbon dioxide. Since methane is toxic, flammable and a major greenhouse gas, that's triple good news.

In case you were wondering, yes, CO₂ is a greenhouse gas too, but methane is 23 times worse. Now, thanks to this pioneering plant, all that trash (the rotting 2.5 million tonnes of it) will be a bit more environmentally friendly!