1 . For the history of life on Earth, organisms have relied on the light of the sun, moon, and stars to find their way and schedule their lives. While the beginning of electric lighting in the late 19th century may have benefited humans, it has caused problems in the natural world. Among the impacts of artificial light at night(ALAN), light pollution lures migrating birds to cities with shocking consequences, contributes to the alarming decline in insect populations, and convinces sea turtle babies to amble(缓行)away from the water instead of towards it.

Now, a new study from the University of Plymouth adds another disappointing finding about how ALAN is affecting the creatures with whom we share the planet: Light pollution from coastal cities can trick corals(珊瑚)into reproducing outside of the optimum times when they would normally reproduce.

Using a combination of light pollution data and spawning(产卵)observations, researchers were able to show for the first time that corals exposed to ALAN are spawning one to three days earlier and closer to the full moon compared to those on unlit corals. “That shift may reduce the survival and fertilization success of gametes(配子)and genetic connectivity between nearby lit and unlit coral systems,” they explain.

“Corals are among the most biodiverse, economically important, and threatened ecosystems on the planet,” write the authors of the study.

“Climate change has led to mass bleaching(褪色)events. Habitat destruction, fisheries, and pollution have reduced corals substantially since the 1950s,” they write, adding, “The complete loss of corals is anticipated over the next 100 years.”

If we want to reduce the harm ALAN is causing, we could perhaps look to delay the switching-on of night-time lighting in coastal regions to ensure the natural dark period between sunset and moonrise when coral reproduction remains undisturbed.

2 . Hardscaping refers to non-organic features of a landscape such as pathways, driveways, walls, steps, and other human-made structures. The three Rs, which are common to many sustainability efforts, apply to hardscaping: reduce, reuse, and recycle.     1    

Reduce Runoff

You can reduce rainwater runoff by using permeable (可渗透的) materials that allow rainwater to get into the soil below.     2     Because, to use permeable materials, you need to dig deeper to set into multiple layers (层) of sand,tiny stones,and other materials that allow rainwater to permeate well, using them under a tree can disturb or even destroy roots that keep trees healthy and upright. It’s also a good idea to slope (倾斜) any impermeable surface to direct rainwater to your garden to save from watering it.

Use Recycled Materials

Consider using materials that are recycled from reclaimed (再生的) concrete, glass, or other construction materials that might otherwise end up in a landfill.     3     Your local landfill might sell other usable materials as well. Recycled wood can be used to make borders between different areas. Just make sure it hasn’t been treated with chemicals, especially if you grow food nearby.

Support Local Wildlife

    4     Using permeable hardscape makes the soil below beneficial to them, whether they are earthworms, ground-nesting bees and other beneficial insects, important microorganisms, or plant roots. Between hardscaped areas, plant native trees and flowers to create wildlife habitats.     5    

With careful planning and action, you can enjoy the convenience brought by hardscaping and at the same time be considerate to the environment and local wildlife.

3 . Slowness has been a sweeping trend in sustainability. Slow food celebrates local produce and traditional cooking methods; slow fashion is made with a focus on people and the planet. You may have even heard of the slow city, a campaign to restore local cultures and turn cities back to their natural environments.

Slow design developed from the larger slow movement. Although the term was only recently introduced, the idea of thoughtful design looks back to a time when buildings and furniture were made with great craftsmanship (手艺) and by hand-before the mass-produced throwaway furniture took over. You can think of the term “slow” as a celebration of timelessness: both the timelessness of a piece and the timelessness of the relationship between that piece and its owner.

One example of slow design today is what’s been dubbed the brown furniture revival (复兴). Brown furniture refers to the heavy wooden furnishings that were popular in your grandparents’ day but suddenly fell out of style at the turn of the century. Brown furniture is often associated with dark woods, such as trees like mahogany, walnut, and teak, that take decades to reach maturity and true craftsmanship to transform into functional pieces.

Today’s furniture industry is dominated by the $13.1 billion-and-growing global ready-to-assemble(RTA) furniture market. RTA furniture is usually constructed from low-quality fiberboard, which lasts a small part of traditional furniture’s lifespan (寿命).The weight of furniture landfilled in 2018 was 9. 7 million tons, 4. 5 times what was landfilled in 1960.

In a less direct way, the idea of timelessness also lends itself to a lower environmental impact. Besides their demonstrated physical durability, slow materials and design are meant to outlive trends and never be thrown out simply because they’re out of style.

As second-hand shopping becomes more appealing to today’s young generation-because of its low environmental impact and affordability-the brown furniture of yesteryear is making a comeback.