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EARTH OVERSHOOT DAY
EARTH OVERSHOOT DAY
Monday, 29 August 2022
Link: https://www.overshootday.org/
Synopsis:
Earth Overshoot Day marks the date when humanity’s demand for ecological resources and services in a given year exceeds what Earth can regenerate in that year.
In 2022, Earth Overshoot Day landed on July 28, and it arrives earlier every year. Currently, 1.75 Earths are required to support humanity's demand for ecological resources and services.
Earth Overshoot Day is calculated by Global Footprint Network and is a campaign supported by dozens of other nonprofit organizations. To determine the date of Earth Overshoot Day for each year, Global Footprint Network calculates the number of days of that year that Earth’s biocapacity suffices to provide for humanity’s Ecological Footprint.
Talking Points:
What does the Ecological Footprint measure?
What does biocapacity measure?
How is it possible for humanity to consume as much ecological resources as if we lived on 1.7 planets?
Has the increase of the global ecological deficit been accelerating or slowing down over the past few years?
How can we #MoveTheDate?
Mandai Wildlife Bridge
Mandai Wildlife Bridge
Friday, 6 May 2022
Synopsis:
Nearly 70 species of wildlife have been spotted using the Mandai Wildlife Bridge, which was launched in December 2019 to link forest patches in the Central Catchment Nature Reserve that are otherwise separated by the Mandai Lake Road. One of its aims was to reduce the risk of roadkill by allowing wildlife to cross Mandai Lake Road safely.
Six cameras were installed along the bridge to spot signs of animals and the information is used to shape environmental management and other plans for ecological restoration.
Talking Points:
What is a wildlife crossing?
Why are wildlife crossings important?
Are wildlife crossings the best solutions to our environmental issues? What other things can we do to improve our environmental issues?
Can Opera Singers really break wine glasses by singing to it?
Can Opera Singers really break wine glasses by singing to it?
Friday 19th February 2021
Synopsis: A human voice can shatter a glass. Every object has a resonant frequency – the natural frequency at which something vibrates. Wine glasses, because of their hollow shape, are particularly resonant. If you run a damp finger along the rim of a glass, you might hear a faint, ghostly hum – the resonant frequency of the glass. Or you can simply tap the glass and hear the same frequency. To shatter the glass, a singer’s voice has to match that frequency, or pitch, and has to be significantly loud.
And the singer also needs to hold that note for at least two to three seconds for the vibration to build up enough to cause the glass to shatter.
Talking Points:
The singer's voice caused the resonance of the wine glass. (resonance: highly energetic vibrations)
The resonance of the wine glass causes the glass to break.
Everything has their own natural frequency. How do you think this may affect construction processes?
From the ECG perspective, the understanding of Resonance is crucial for professionals in the line of civil engineering, product engineering, etc.
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