P1People often complain that plastics are too durable. Water bottles, shopping bags, and other trash litter the planet, from Mount Everest to the Mariana Trench, because plastics are everywhere and don’t break down easily. But some plastic materials change over time. They crack and frizzle. They “weep” out additives. They melt into sludge. All of which creates huge headaches for institutions, such as museums, trying to preserve culturally important objects. The variety of plastic objects at risk is dizzying: early radios, avant-garde sculptures, celluloid animation stills from Disney films, the first artificial heart.

P2Certain artifacts are especially vulnerable because some pioneers in plastic art didn’t always know how to mix ingredients properly, says Thea van Oosten, a polymer chemist who, until retiring a few years ago, worked for decades at the Cultural Heritage Agency of the Netherlands (RCE). “It’s like baking a cake: If you don’t have exact amounts, it goes wrong,” she says. “The object you make is already a time bomb.”

P3And sometimes, it’s not the artist’s fault. In the 1960s, the Italian artist Piero Gilardi began to create hundreds of bright, colorful foam pieces. Those pieces included small beds of roses and other items as well as a few dozen “nature carpets”—large rectangles decorated with foam pumpkins, cabbages, and watermelons. He wanted viewers to walk around on the carpets—which meant they had to be durable.

P4Unfortunately, the polyurethane foam he used is inherently unstable. It’s especially vulnerable to light damage, and by the mid-1990s, Gilardi’s pumpkins, roses, and other figures were splitting and crumbling. Museums locked some of them away in the dark.

P5So van Oosten and her colleagues worked to preserve Gilardi’s sculptures. They infused some with stabilizing and consolidating chemicals. Van Oosten calls those chemicals “sunscreens” because their goal was to prevent further light damage and rebuild worn polymer fibers. She is proud that several sculptures have even gone on display again, albeit sometimes beneath protective cases.

P6Despite success stories like van Oosten’s, preservation of plastics will likely get harder. Old objects continue to deteriorate. Worse, biodegradable plastics, designed to disintegrate, are increasingly common.

P7And more is at stake here than individual objects. Joana Lia Ferreira, an assistant professor of conservation and restoration at the NOVA School of Science and Technology, notes that archaeologists first defined the great material ages of human history—Stone Age, Iron Age, and so on—after examining artifacts in museums. We now live in an age of plastic, she says, “and what we decide to collect today, what we decide to preserve…will have a strong impact on how in the future we’ll be seen.”

P1Scientific papers are the recordkeepers of progress in research. Each year researchers publish millions of papers in more than 30, 000 journals. The scientific community measures the quality of those papers in a number of ways, including the perceived quality of the journal (as reflected by the title’s impact factor) and the number of citations a specific paper accumulates. The careers of scientists and the reputation of their institutions depend on the number and prestige of the papers they produce, but even more so on the citations attracted by these papers.

P2Citation cartels, where journals, authors, and institutions conspire to inflate citation numbers, have existed for a long time. In 2016, researchers developed an algorithm to recognize suspicious citation patterns, including groups of authors that disproportionately cite one another and groups of journals that cite each other frequently to increase the impact factors of their publications. Recently, another expression of this predatory behavior has emerged: so-called support service consultancies that provide language and other editorial support to individual authors and to journals sometimes advise contributors to add a number of citations to their articles.

P3The advent of electronic publishing and authors’ need to find outlets for their papers resulted in thousands of new journals. The birth of predatory journals wasn’t far behind. These journals can act as milk cows where every single article in an issue may cite a specific paper or a series of papers. In some instances, there is absolutely no relationship between the content of the article and the citations. The peculiar part is that the journal that the editor is supposedly working for is not profiting at all—it is just providing citations to other journals. Such practices can lead an article to accrue more than 150 citations in the same year that it was published.

P4How insidious is this type of citation manipulation? In one example, an individual—acting as author, editor, and consultant—was able to use at least 15 journals as citation providers to articles published by five scientists at three universities. The problem is rampant in Scopus, a citation database, which includes a high number of the new “international” journals. In fact, a listing in Scopus seems to be a criterion to be targeted in this type of citation manipulation.

P5Scopus itself has all the data necessary to detect this malpractice. Red flags include a large number of citations to an article within the first year. And for authors who wish to steer clear of citation cartel activities: when an editor, a reviewer, or a support service asks you to add inappropriate references, do not oblige and do report the request to the journal.

P1I was shocked to learn recently that some scientists want to scale back their research in an effort to decrease carbon emissions. The crisis is here, they said, and we need to cut back on our energy-intensive modelling. At the very least, we need to make our energy use far more sustainable.

P2It is unarguable that our laboratories, scientific instruments, rockets and satellites—the tools we scientists need to measure the planet’s pulse—demand significant amounts of energy both in their construction and operation. And it is equally true that science’s unrelenting appetite for information has caused a mushrooming of energy-intensive data centres around the world. According to the International Energy Agency, these buildings now consume about 1 percent of the world’s electricity.

P3However, this is a price we must pay for understanding the world. How can we inform decision makers about the best ways to bring down carbon emissions if we can’t track the amount of carbon dioxide in the atmosphere, where it’s coming from and who’s producing it? The carbon emissions from technological research are well spent: ultimately this research will safeguard the future of our planet.

P4It can be hard for scientists to make the case because our work is complex, often takes place behind closed doors and does not always lend itself to easy interpretation or explanation. But demonstrating the efficacy of science will be crucial if we are to solve humanity’s greatest challenges. It is all too easy to feel paralysed in the face of daunting problems such as climate change and to do nothing. But then I think of a friend’s daughter who turned her fears into action: she became a wind energy engineer and now thrives on delivering renewable energy, limiting emissions.

P5Recognising the hope that science and engineering can bring was the impetus behind the creation of the Millennium Technology Prize, which is now entering its 20th year as a celebration of human ingenuity. One of the past winners, Professor Martin Green from the University of New South Wales, Australia, is the inventor of the Passivated Emitter and Rear Cell technology which is now found in most of the world’s solar panels. Thanks to his invention, we have a real chance to decrease the world’s carbon emissions.

P6Every day, scientists, technologists and engineers are discovering new ways to exploit renewable energy sources and develop techniques not just to use power more intelligently but to power our intelligence. A great example of this is Europe’s largest supercomputer, LUMI in Finland, which is astonishingly carbon-negative. Established in an old paper mill, it is powered by a nearby river and its remote heat warms the people who live in the surrounding town of Kajaani.

P7If the world is to meet its net-zero ambitions, we must think hard about how we can deliver sustainable computing and deliver more LUMIs.