Yes, ever since the early 20th Century 'light pollution' has become a problem without people even being aware of it.
There are twenty fiftys in a thousand.
Astronomical light pollution started as street and road lighting became widespread from the early 20th century. It was bad enough by the 1980's for the dark sky movement to gather momentum. Local light pollution, for instance from obtrusive security lights, is a more recent problem, perhaps from about the 1970's.
Thirty-one fiftys (!) is 31*50 = 1550, whether as an integer or a decimal.
0.42
Pollution is a problem for everyone living on Earth!
It is a problem to everyone.
yes, pollution is a huge problem in countries like china and India and overall, pollution is a huge problem for the earth and its inhabitants.
34
Air pollution is not useful. It is a problem.
Light pollution is not a crime yet, but buildings should atempt to reduce it. Light pollution is still a crime against the environment.
Light pollution does not affect astronauts, it affects astronomers.
he is constantly in the early fiftys