tungwaiyip.info

home

about me

links

Blog

< June 2008 >
SuMoTuWeThFrSa
1 2 3 4 5 6 7
8 91011121314
15161718192021
22232425262728
2930     

past articles »

Click for San Francisco, California Forecast

San Francisco, USA

 

Plastic bag pollution

Recently I have come to aware of the issue of Great Pacific Garbage Patch from the media. It is large region in the Pacific Ocean that has accumulated much man-made garbage carried there by ocean current. Amount them are many plastic trash. On one hand plastic are very durable because they are not biodegradable. On the other hand plastic are photodegradable, meaning under the exposure of sunlight, they will slowly break down into smaller and smaller pieces. The result is a high concentration of pollutant in the water that is nearly impossible to clean up.

To most people this problem is nothing more than just a scientific interest. After all we don't venture into the middle of the ocean. So this problem is out of sight, out of mind. But today I have personally experienced the effect of photodegradation right in my own backyard.

Two years ago my mother has spent several months in my home. In her spare time she has built a vegetable garden in the yard. Being, shall I say, a resourceful person, she has reused many trash items to build a trellis. For example she scavenged many plastic bags that we would have throw away and used it as ties to the stakes.

Unfortunately, after she has left, we have not given the garden proper upkeep. It was quickly overrun by weeds. And finally I have to clear it out. As I was dismantling the trellis, I found the plastic bags have become very flaky. After exposed in sunlight for 2 years, the have all photodegraded. As I tried to remove them, they just break down into small pieces of white plastic and scattered all over the garden. There is just no way for me to mop up these tiny pieces from the soil. Who would have thought plastic bags can turn into a much bigger headache after it has degraded like this.

2008.06.14 comments

 

 

blog comments powered by Disqus

past articles »

 

BBC News

 

Brexit: Cabinet considering ramping up no-deal plans (18 Dec 2018)

 

Yemen war: Ceasefire takes effect in Hudaydah after skirmishes (18 Dec 2018)

 

Jose Mourinho: Manchester United sack manager (18 Dec 2018)

 

Gently stroking babies 'provides pain relief' (18 Dec 2018)

 

China 'will not seek to dominate' (18 Dec 2018)

 

Women shave their heads to protest lawyer's detention in China (18 Dec 2018)

 

Russian cargo ship runs aground off Cornwall coast (18 Dec 2018)

 

El Salvador court frees woman jailed under anti-abortion laws (18 Dec 2018)

 

Two Scandinavian women tourists found dead in Morocco (18 Dec 2018)

 

Former CBS boss Les Moonves denied exit pay (18 Dec 2018)

more »

 

SF Gate

 

For retailers, smartphone is the future of store expierience (17 Dec 2018)

 

Ship traffic, December 18 (17 Dec 2018)

 

Equifax failed to match security to its growth, report says (16 Dec 2018)

 

Hertz teams up with Clear to speed rentals with biometric scans (16 Dec 2018)

 

Analysis: Is tech too easy to use? (16 Dec 2018)

 

San Franciscans Googled some weird stuff in 2018 (15 Dec 2018)

more »


Site feed Updated: 2018-Dec-18 03:00