Question

. Read the passage given below.
(8)
When a group of astronomers found it difficult to spot stars in the Tuscon township sky, they
knew it was time to act. The night sky was getting polluted from excessive light. This group,
called the International Dark-sky Association (IDA), has now come up with a prize for the best
night sky, a world heritage status.
IDA Director Reg R Wilson said in an interview to the Hindustan Times that the proposal
would perhaps motivate countries to draw up rules to protect the night sky. Several countries
have now enacted light pollution laws.
The International Dark-sky Association is an association of astronomers and lighting
engineers formed 12 years ago by the Chief Astronomer of Kitt Peak National Observatory,
USA. Light pollution, a relatively unheard form of pollution, happens with excessive outdoor
lighting.
A great deal of 'waste light' is generated when this light is thrown upwards. This gives an
artificial glow to the night sky, making it difficult to spot stars. Other kinds of pollution do
their bit to damage the night sky.
Wilson said 'waste light' meant loss of precious electrical energy and thereby contributing to
greenhouse gas emission. "15 to 35% light is wasted this way and the US loses about 5 billion
dollars”, he said. Professional light engineers should design exterior light for safety and
comfort, he said. Countries such as the USA, Australia and Italy have framed laws against
light pollution. Six months ago, the Czech Republic made a law that all exterior light must be
shielded so that no light goes up.
The Australian standard allows a maximum of 6% waste upward light which is to be reduced
to 3% within a few years.
In Sydney, the facade of a building can't be lit up with floodlights. High intensity floodlights
aimed at higher angles can reflect upto 70% of the intensity into the night sky. Structural
elements of buildings can be enhanced with low light, giving it a more dramatic effect than
'blasting a whole lot of light'.
Lights from billboards, streetlights, service stations, car parking, sports lighting also add up
to light 'clutter', create glare and waste upward light.​

Answer 1

Answer:

yeah I read it but what you wanna know