Hello and welcome to the intelligence from The Economist.

I'm your host, Jason Palmer.

Every weekday we provide a fresh perspective on the events shaping your world.

For decades, hydrogen has been touted as a potentially transformative green fuel, yet it remains in a tiny market niche.

That looks set to change, as long as the waves that it's harvested get a little greener too.

And the word unicorn usually conjures up images of shiny Silicon Valley companies, but startups are

reaching that billion-dollar valuation all over the world.

We look into the herd of unicorns that's popped up in Mexico.

First up, though.

Over the weekend, protesters thronged in Warsaw, an estimated 100,000 of them.

Poland is a member of the European Union, and the demonstrators wanted to keep it that way. Organes UNI European

European countries

...theirond...

...theircathes by the

Republic of the Tracta.

Last week, one of the country's top courts

defied the EU, ruling that Polish law

should take precedence in the country over European courts defied the EU, ruling that Polish law should take precedence in

the country over European law. EU Justice Commissioner Didier Reinders vowed to defend the

bloc's jurisdiction. Our position is very clear about the primacy of the EU law. You know that

over the past months, we have consistently recalled a number of fundamental principles of EU law,

principles that have been governing the Union from the very beginning is at the core of the Union.

...