Light pollution is a significant but overlooked driver of the rapid decline of insect populations,according to the most comprehensive review of the scientific evidence to date.
Artificial light at night can affect every aspect of insects' lives,the researchers said. "We strongly believe artificial light at night - in combination with habitat loss,chemical pollution,invasive species,and climate change - is driving insect declines, " the scientists concluded after assessing more than 150 studies.
Insect population collapses have been reported around the world,and the first global scientific review published in February,said widespread declines threatened to cause a "catastrophic collapse of nature's ecosystems".
There are thought to be millions of insect species,most still unknown to science,and about half are active at night.Those active in the day may also be disturbed by light at night when they are at rest.
The most familiar impact of light pollution is moths（飞蛾）flapping around a bulb,mistaking it for the moon.Some insects use the polarisation of light to find the water they need to breed,as light waves line up after reflecting from a smooth surface.But artificial light can scupper （使泡汤）this.Insects are important prey （猎物）for many species,but light pollution can tip the balance in favour of the predator if it traps insects around lights.Such increases in predation risk were likely to cause the rapid extinction of affected species,the researchers said.
The researchers said most human-caused threats to insects have analogues in nature,such as climate change and invasive species.But light pollution is particularly hard for insects to deal with.
However,unlike other drivers of decline,light pollution is relatively easy to prevent.Simply turning off lights that are not needed is the most obvious action,he said,while making lights motion-activated also cuts light pollution.Shading lights so only the area needed is lit up is important.It is the same with avoiding blue-white lights,which interfere with daily rhythms.LED lights also offer hope as they can be easily tuned to avoid harmful colours and flicker rates.



What is the 5th paragraph mainly about？ ______

A. How light travels in space.
B. How light helps insects find food.
C. How the food chain is interrelated.
D. How light pollution affects insects.

What does the underlined word "analogues" in Paragraph 6 probably mean？ ______

A. Selective things.
B. Similar things.
C. Variations.
D. Limitations.

What is the purpose of the last paragraph？ ______

A. To offer solutions.
B. To give examples.
C. To make comparisons.
D. To present arguments.

What is discussed in the passage？ ______

A. Causes of declining insect populations.
B. Consequences of insect population collapses.
C. Light pollution：the key bringer of insect declines.
D. Insect declines：the driver of the collapsed ecosystem.