Lucky for you, you can get around with English in most places.

Ireland didn’t leave the EU, so that’s an option.

In most big cities you can get around just fine. In some you can actually live very comfortably.

As far as laws go, as an EU citizen one is entitled to communication with any public institutions one may come across in their preferred “official language”. Stuff like paying your utility bills, registering health insurance, similar bureaucratic stuff, as well as getting stopped by the police. You can insist on doing it in any one of 28 languages, including English.

Usually that’s a bit overkill, and whoever you’re dealing with will be happy to speak to you in English or find someone else who does if they don’t. I assume the same goes for non-citizens. German and French are also quite popular, but English is by far the most ubiquitous.

Today “This extension is no longer supported” doesn’t mean there’s something seriously wrong with it, it means “Google doesn’t support the fact you want to use it”.

Short answer: the bank won’t give your shiny new tree-planting business a loan as easily as it will to a “liquid tank tree replacement” one.

Long answer:

• Trees take time to grow
• Trees need to be planted
• Trees make shade
• Animals like birds and insects like bees and mosquitos like to live next to them
• Trees don’t need electricity
• Trees take in heat radiated from the pavement
• Trees don’t look cool

While algae are more efficient at turning CO2 into oxygen in theory, in practice algae don’t have a good climate in such a tank (no oxygen without ventilation, i.e. constant electricity and they get cooked through the glass).

All in all, more of a gimmick than anything.