Effects of Artificial Light

The video discusses the impact of light pollution, starting with the 1994 LA earthquake blackout that revealed the Milky Way to many for the first time. It explores how electric light has transformed society, often at the cost of true darkness, and how artificial light is now considered a form of pollution. The video highlights the health and ecological impacts of light pollution, including disrupted biological clocks and threats to wildlife. It concludes with potential solutions and regulations to mitigate these effects, emphasizing the need for awareness and action.

What unexpected phenomenon did people in Los Angeles observe during the 1994 blackout?

• An unusual animal migration

• A decrease in air pollution

• A sudden increase in temperature

• A giant silvery cloud in the sky

What was one of the most dramatic changes to the biosphere due to artificial lighting?

• Increased rainfall

• Rise in global temperatures

• Decrease in biodiversity

• Introduction of light into the night

How does artificial light at night affect human health?

• It improves sleep quality

• It disrupts the biological clock

• It reduces stress levels

• It enhances melatonin production

Which hormone is affected by exposure to artificial light at night?

• Insulin

• Melatonin

• Adrenaline

• Cortisol

What impact does artificial light have on freshly hatched turtles?

• It misleads them inland

• It has no effect

• It guides them to the sea

• It helps them find food

What is one of the ecological effects of artificial light on trees?

• Trees produce more fruit

• Trees grow taller

• Trees bud earlier and lose leaves later

• Trees bud later and lose leaves earlier

What is a recommended individual action to reduce light pollution?

• Use only blue light bulbs

• Use brighter lights

• Install more outdoor lighting

• Turn off lights when not needed

Which country has implemented measures to reduce light pollution by banning sky beams?

• India

• France

• United States

• China

What is one of the benefits of using lampshades?

• They increase light intensity

• They block unwanted stray light

• They make lights more colorful

• They are more energy-consuming

What is a potential consequence of not addressing light pollution?

• Improved human health

• Increased visibility of stars

• Disruption of ecosystems

• Decrease in energy consumption