Questões de Concurso

U.K. Cyclists to Deliver Bikes, Supplies to Calais Refugees

Sarah Morpurgo has no idea how many people will join her on a 65‐mile bike trip this weekend to deliver critical supplies to refugees and migrants living in a camp known as “the New Jungle” in Calais, France, but she’s feeling optimistic.

On Tuesday, the Facebook page for Critical Mass to Calais, an informal bike ride being led by Morpurgo and her friends, said 993 people planned to attend, although she acknowledged that many of those might be “solidarity clicks” in support of the journey.

“It’s going to be a bit of a surprise as to how many people will turn up, ” Morpurgo,25, told Newsweek. “Seven more people really need to hit ‘click.’”

Seven people had done just that a day after Newsweek spoke with Morpurgo, bringing the total number “attending” to 1,000. An Indiegogo campaign for the bike ride, which will take place August 29 to 31, had reached its 1,000‐pound ($1,547) fundraising goal.

Once they get to Calais, the cyclists plan to give refugees and migrants their bikes, a much‐needed form of transportation that will make it easier for the camp’s residents to get to shops and health care clinics. Supplies such as hygiene products, tents, sleeping bags and clothing will be taken to Calais in support vehicles and donated through the Secours Catholique – Caritas France charity.

The port city of Calais has come under intense focus in recent months, becoming a symbol of a staggering global crisis of displacement: 1 out of every 122 people on Earth is either a refugee, an asylum seeker or displaced, the highest such number since World War II, according to the office of the United Nations high commissioner for refugees... (...)

(Available: http://www.newsweek.com/critical‐mass‐uk‐cyclists‐deliver‐bikes‐and‐supplies‐calais‐refugees‐366284. Adapted.)

How things work: 100 scientific explanations

Preservation property has always been important to humans. Historians in the ninth century were the first to record the use of varnish, a protective liquid composed of resins, natural oils, and alcohol, among other ingredients. Furniture makers learned that if they painted coats of the stuff on a piece of furniture or wood floor, it made it impervious to liquids and their damage and shielded it from normal wear and tear. And the makers liked the shine furniture had after it was varnished.

Varnish comes in many formulations. Some are oil based, using linseed or tung oil, while others are water-based. Varnish cures, or dries, on what it’s painted, creating a glossy, clear film on the surface. Some oil-based varnishes can turn to a yellowish color; water-based varieties do not. Wood must be carefully cleaned and sanded before any varnish is applied. Several coats are often required. All varnishes contain resins — terpenes with five-carbon molecules called isoprenes and also include a drying oil or solvent to reduce drying time.

Although furniture and flooors are still the most frequently varnished items, the wooden hulls of boats are also often varnished. Clear nail polish, a type of varnish, can be used for countless small fixes: dab small amounts to keep splintered wood from snagging, prevent ink from running, and stop buttons on clothing or screws on sunglasses from coming loose.

(National Geographic Special Publication “How Things Work” Adapted.)