![Europe Calling show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/049/928/small/europe-calling.jpg)
Summary: Greta Thunberg, the teenage environmental activist, arrived in Madrid on Friday morning to participate in a march in the Spanish capital, which is currently hosting the United Nations climate summit known as COP25. Spain will press ahead with the creation of a tax on certain digital services as soon as a government is formed, according to sources from the caretaker executive. This so-called “Google tax” could, however, raise the ire of the United States, which has already threatened France with reprisals over a similar levy.