Adidas Creates Trainers Made From Plastic Ocean Debris in Bid To End Pollution (telegraph.co.uk)
Adidas is building on its previous commitment to turn plastic pollution into high-performance products. Next month, the German sportswear will begin selling three new editions of its popular UltraBoost shoe, all made from plastic debris found in the ocean. From a report: Helping to achieve its goal of creating one million pairs of the Ultra Boost style, Parley for the Oceans will produce trainers made from recycled ocean waste. Made up of 11 reused plastic bottles in each pair, the Ultra Boost' laces, lining and sock lining covers will be made of other recycled products, making for an environmentally-friendly high-performance product.
I fail to see the downside here. It's also not slang, it's just the word we use.
It's a word used by a small minority of English speakers. It's not a literary word. It's a slang used when talking to an audience which has not idea what it is. And it was used in the title of an article about a global company -- not a local event (which might have justified the usage). In the US it's considered British slang. It will not show up if you try to look it up by typing "define trainers" in Google search bar. If you try to lookup "soda" in the same manner (which is a colloquialism for "carbonated water", but not a slang), you will get a definition.
Any guest worker system is indistinguishable from indentured servitude.