I think unreported employment is being handled by customs and the tax administration, not the police.
Also, migrants include naturalized citizens and people with permission to work.
In Germany:
I don't remember ever seeing "combined lights" with single red or yellow lamps and multiple greens. Level crossings often have only red and yellow lights, missing green.
Traffic lights are positioned at the entrances to intersections, not the exits. They also come with backup signs (stop sign, yield sign, etc.) for when the lights are disabled or defective. Working traffic lights override these signs.
Solid green also means an unprotected left turn that must yield to oncoming traffic.
A green arrow traffic light can override a solid red to give you a protected turn. A green right arrow on a sign gives you an unprotected right turn on a red. Without this, you cannot turn right on a red.
Flashing yellow means 'caution' in general and is usually used on auxiliary lights to warn about crossing pedestrians after a turn, who have right of way. When the main traffic lights are flashing yellow, they're disabled or defective.
I remember that the city I grew up in, long ago, used to disable many traffic lights at night. Their website claims that "due to the large number of visually impaired and blind citizens, the traffic lights at the most important traffic junctions are kept in operation at night", so I guess this still continues. The village I'm living in these days has no traffic lights at all.
Ich bezahle mit der Android-App meiner Bank, die eine girocard und eine Visa Karte enthält, und nicht mit Google Pay kooperiert. Ich frage mich, was Google hier noch an Daten sammelt, außer dass die App und NFC benutzt wurde. Die Datenschutzerklärung liest sich relativ generisch (zu jeder App passend) und die App scheint keine zahlungsbezogenen Daten zu sammeln.
(AFAIK ein Unterschied zum Apple-Ecosystem, wo man an Apple Pay nicht vorbei kommt.)
Well, Wikipedia claims
The Earth has an internal heat content of 10^31^ joules (3×10^15^ TWh), About 20% of this is residual heat from planetary accretion; the remainder is attributed to past and current radioactive decay of naturally occurring isotopes.
In that sense, it's the only renewable energy source we have that's not indirectly powered by the sun. It's most similar to (proper) nuclear power, but the latter isn't "renewable" because it requires digging up fuel from the crust.
My mother would have trouble using a small phone at its default display scale. Large text, small screens and poorly designed UIs do not mix.