Ordered a few of these off eBay, they are actually closed to five bucks and with a little tinkering allow you to control a powercord with an Android app (or even Alexa or IFTTT).
Not sure if I have mentioned this or not but I have been working with a really cool Bulgarian organization (and the Bulgarian government) on a small environmental awareness project here on the coast. Bulgarian cities (especially the capital) have some of the worst, if not the very worst, air quality in Europe and I wanted to take part in this little initiative and help the local folks make some better choices in how they treat their air. There is no traffic or any industry here on the coast and the air quality is generally very good but that can easily and quickly change. Fingers crossed that something positive will come out of this.
Here is a link of my lonely station, feel freed to dig around the data if you like and have a gander at other parts of Europe.
In case you are curions the devices uses a Nova PM sensor SDS011 for detecting particulates in the air and a BME280 sensor for temperature and humidity (the whole project uses Arduino) and is connected on my balcony right now. Amalia will give it a nice decorative pant job next week and I will build a more permanent mounting solution.