It was once a shoreline buried by enough garbage to make it invisible (看不见的), thus, given the unfortunate nickname "toilet bowl" . Now the Philippines' Manila Bay beach is totally different, compared with a few months ago. It happened so suddenly and extremely that it brought tears to the eyes of the local people.

The cleanup started on 27 January, when 5, 000 volunteers descended on Manila Bay to remove over 45 tons (公吨) of garbage, marking the beginning of a nation-wide environmental campaign. But some two months before this great movement began, a quiet revolution was already underway.

During the first week of December 2018, Brooklyn- based Bounties Network collected three tons of garbage from Manila Bay every two days through a project that paid a small group of people, mostly fishermen, with a digital currency (数字货币) based on the Ethereum system.

For the mostly non-bank -using Filipino fishermen, this was a first-ever experience with a digital currency. It's one that proves decisive in enabling poor communities around the world to take up arms in the fight against humanity's waste.

There are signs that this recycling-for-digital payment industry may be just about to take off. Earlier in September 2018, Plastic Bank, a Vancouver -based company powered by IBM technology, also started a similar project. They set up a project in Naga, a town in southern Luzon, the country's largest island, building a collection point to let people exchange plastic and recyclable materials for digital payouts through a system.

That both these pioneers have chosen the Philippines as their first location is not surprising considering the country's contribution to ocean waste. A Wall Street Journal study in 2015 revealed that the Philippines make the third-largest amount of plastic waste into global oceans.

Back in Brisbane, Australia, for the Christmas break, I found myself in a public transport dead zone. Bikeless, 7 kilometers from where I was meeting friends and unwilling to get a taxi, I decided to borrow an electric scooter. The trip took far longer than it would have by bike, mainly because of a major spill halfway there. A rock, hit at speed, is a terrible thing: weeks later, I still had the red knees of a primary schooler.

E-scooters have appeared in Brisbane like a rash. In the UK, they are legal only on private land, but the Department for Transport is discussing how to regulate them on public roads and pathways, with the potential for legalisation later this year.

Other cities that have e-scooter rental programs have had teething problems. In Paris, mayor Anne Hidalgo described the situation last year as messy. She has announced that the city is reducing its number of e-scooters to 15,000 and plans to create laws banning them from pavements (人行道). France has put into force laws limiting e-scooter speeds to 25 kilometres per hour.

Similar to dockless (无桩的) hire bicycles, e-scooters are parked on pavements and people leave them up trees or throw them into rivers. Rough handling shortens their lifetime, which is bad for both profitability and the environment. Analysis suggests that the average e-scooter’s lifetime is just three months.

I think e-scooters are an essential part of the effort to make city transport greener. They are seen as a solution to the “last mile” problem — a potential way to reduce transport jam by rapidly getting someone to their final destination. Cars can take up 28 times the space of a person riding a bicycle.

As far as the environmental effect goes, recent research suggests that e-scooters are not as green as walking or cycling, but they are still better than cars. And despite numerous reports of serious accidents, scooting is about as safe as cycling.

Stephen Gossling at Lund University in Sweden has suggested we build car-free “micromobility” streets, where cyclists, pedestrians (行人) and e-scooters could share the road. He thinks this will reduce accident risks and invite more vulnerable (易受伤害的) traffic participants, such as children, to become active transport users.

If more e-scooters mean fewer cars on roads, an improvement in local air quality is also a likely outcome. When 20 kilometers of roads in central London closed for World Car-Free Day last September, a temporary air quality monitor in Regent Street reportedly registered a 60% drop in nitrogen dioxide.

Styrofoam, or polystyrene, is a light-weight material, about 95 percent air, with very good insulation (隔热) properties, according to Earthsource. org. It is used in products from cups that keep your drinks hot or cold to packaging material that protects items during shipping. With the above good features, Styrofoam still enjoys a bad reputation. It cannot be recycled without releasing dangerous pollution into the air. The U. S. Environmental Protection Agency says it is the fifth-largest creator of harmful waste.

But now the common worms which are usually disgusting can come to the rescue, specifically, meal-worms. Scientists from the U. S. and China have discovered that meal-worms can digest plastic. One meal-worm can digest a pill-sized amount of plastic a day. Study co-author Wei-Min Wu says that in 24 hours, the plastic is turned into carbon dioxide.

Since Styrofoam has no nutrition at all, are the worms hurt by eating plastic? Much to the scientists’ surprise, the study found that worms eating Styrofoam were as healthy as worms eating bran (谷糠) . The researchers will study the worm’s eating habits and digesting system, looking to copy the plastic breakdown but on a larger scale. Once the way can be put into practice, it will make a revolutionary difference to the disposal of plastic.

“Solving the issue of plastic pollution is important”, says Wu, a Stanford University environmental engineering instructor. After all, our earth is small and landfill space-is becoming limited with too much garbage waiting to be dealt with, he says.

About 33-million tons of plastic are thrown away in the United States every year. Plastic plates, cups and containers take up 25 percent to 30 percent of space in America’s landfills. One Styrofoam cup takes more than 1 million years to recycle in a landfill, according to Cleveland State University.