1 . Stefani Shamrowicz lives in Colorado. The 24-year-old woman has spent 23 days picking up126 bags of rubbish across the country

Having over a month off from her job at a campus recreation center, Stefani Shamrowicz decided to take a trip to help clean up the environment.

She's now driven over 70 hours through Colorado, New Mexico, Arizona, Texas, Louisiana Florida,Georgia,Tennessee,Kentucky，Ohio，Pennsylvania，and New York-cleaning up everything from pee-filled bottles to lawn ornaments. About 80 percent of the rubbish was drinking bottles. Stefani said she had found a few fast-food toys and a tire with a pair of cowboy boots in it and her aim wasn't to shame, but rather encourage people to do what they can

Collecting anywhere from one to 16 bags at a time, Stefani's been discouraged. She felt she wasn't doing enough. She said there was a place that had an ocean of rubbish and she pushed out four bags, but then she broke down because she realized how much rubbish there was and it felt like four bags didn't do anything. But she remembered to just do what she could, especially since she had gone beyond her goal. She said she dedicated that to her parents because they raised her to be an independent person and had been very supportive on the trip

People donated $10 a bag for Stefani to clean up in their name, which she uses for lodging and gas. The person's name is written on how many bags they've donated towards and Stefani posted a picture on her Instagram when they were filed, thanking them for helping clean up the cit she was in.

People online and in person have responded positively to the project. Stefani recalled people sent her pictures of bags of trash they picked up. Once, when she started doing a bag on the beach in Florida,two ladies saw her and started helping her fill the bag.

With her job resuming June 1, Stefani is now back home but she has so many good things to say about her unique U.S.road trip.There's litter everywhere, so I'm just happy to be able to make a little bit of an impact everywhere I go. Cleaning up this litter is a huge thank you for all the joy and good times national parks and nature in general has brought to my life,”she said.

3 . Early fifth-century philosopher St．Augustine famously wrote that he knew what time was unless someone asked him．Albert Einstein added another wrinkle when he theorized that time varies depending on where you measure it．Today's state-of-the-art atomic（原子的） clocks have proven Einstein right．Even advanced physics can't decisively tell us what time is, because the answer depends on the question you're asking．

Forget about time as an absolute．What if，instead of considering time in terms of astronomy,we related time to ecology？What if we allowed environmental conditions to set the tempo（节奏） of human life？We're increasingly aware of the fact that we can't control Earth systems with engineering alone，and realizing that we need to moderate（调节）our actions if we hope to live in balance．What if our definition of time reflected that？

Recently，I conceptualized a new approach to timekeeping that's connected to circumstances on our planet，conditions that might change as a result of global warming．We're now building a clock at the Anchorage Museum that reflects the total flow of several major Alaskan rivers，which are sensitive to local and global environmental changes．We've programmed it to match an atomic clock if the waterways continue to flow at their present rate．If the rivers run faster in the future on average，the clock will get ahead of standard time．If they run slower，you'll see the opposite effect．

The clock registers both short-term irregularities and long-term trends in river dynamics．It's a sort of observatory that reveals how the rivers are behaving from their own temporal frame（时间框架），and allows us to witness those changes on our smartwatches or phones．Anyone who opts to go on Alaska Mean River Time will live in harmony with the planet．Anyone who considers river time in relation to atomic time will encounter a major imbalance and may be motivated to counteract it by consuming less fuel or supporting greener policies．

Even if this method of timekeeping is novel in its particulars，early agricultural societies also connected time to natural phenomena．In pre-Classical Greece，for instance，people“corrected”official calendars by shifting dates forward or backward to reflect the change of season．Temporal connection to the environment was vital to their survival．Likewise，river time and other timekeeping systems we're developing may encourage environmental awareness．

When St．Augustine admitted his inability to define time， he highlighted one of time 's most noticeable qualities：Time becomes meaningful only in a defined context．Any timekeeping system is valid，and each is as praiseworthy as its purpose．

4 . Your own backyard may be a fun place to play. You may have trees to climb, and insects to study.     1    . But did you know these things are related to each other through the food chain? Every part of nature belongs to a community where each member uses the lower members to stay alive.

Every part of the world has food chains, including the oceans and the deserts (沙漠).     2    , the whole chain could fall apart. The food chain is most disturbed (扰乱) by people because we build neighborhoods on the land where animals live and we pollute the environment. Both these actions make it difficult for other living things to survive. Still there is a lot we can do to protect the parts of food chains. Here are some ideas that can help:

    3    . Make your backyard a place that other living things can enjoy. Plant more flowers and trees. And, most of all, try not to disturb the places where other animals live.

Do not pollute the environment. Recycle (回收) any material you can.     4    . Having fewer cars on the road means having better air for all of us to breathe.

Keep learning about and respecting (尊重) plants, animals, and the environment.     5    . You may even pass it on to your own children someday. It's important that as many people as possible protect nature and keep the food chain whole.

5 . The ocean covers more than 70% of our plane. It is so immense(巨大的) that explorers once thought there was no way to cross it. When our ships were advanced enough to do so, naturalists then thought it impossible for humans to ever exhaust fisheries or drive marine species to extinction. They were wrong.

Commercial fishing now covers an area of four times that of agriculture, and much of that expanse has been rendered completely unsustainable. We have reduced 90% of formerly important coastal species. Fish have been harvested so heavily that they are nearly wiped out in many places.

Some may hope that there are immense areas still untouched, given that humans do not live on the ocean, and we need specialized ships to go far beyond the coast. But that is incorrect. Just13% of the ocean remains as wilderness, and in coastal regions where human activities are most intense, there is almost no wilderness left at all. Of the roughly 21 million square miles of marine wilderness remaining almost all is found in the Arctic and Antarctic or around remote Pacific island nations with no populations.

What concerns us now is that most wilderness remains unprotected. This means it could be lost at any time as advances in technology allow us to fish deeper and ship further than ever before. Thanks to a warming climate, even places that were once safeguarded because of year-round ice cover are now open to fishing and shipping.

This lack of protection seems in large part from international environmental policies failing to recognize the unique values of wilderness, instead, focusing on saving at-risk ecosystems and avoiding extinctions. This is similar to a government using its entire health budget on emergency cardiac(心脏的) surgery without preventive politics, encouraging exercise to decrease the risk of heart attacks occurring in the first place.

If Earth's marine biodiversity is to be preserved forever, it is time for conservation to focus not only on the ER but also on preventive health measures.

6 . 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.