J-WAFS in action: collaborative solutions for our greatest challenges
John H. Lienhard V, Abdul Latif Jameel Professor of Water and Mechanical Engineering and Director of J-WAFS, MIT delivered an opening speech at the Indian Institute of Technology Ropar (IIT Ropar) as chief guest and convocation speaker for the Institute’s seventh annual convocation on December 3, 2018. Click here to watch the full address.
(The article text is modified from the speech delivered).
During the past decade I have travelled quite a lot as part of my work for MIT. I have been to more than 30 countries on six continents. People often ask me what is different between these countries. However, what’s more striking to me is how much is the same among all these people. Everywhere I go, people love their children, and they hope for good relations with their neighbors. Everywhere I go, people work to provide for their families. Everywhere I go, people live in some kind of building, and they eat food, and they drink water. They mostly seem to have mobile phones and to travel in motor vehicles. Although their languages and faces can be very different, all these people are very much alike. All have the same desires and needs.
In 1943, the psychologist Abraham Maslow proposed a universal hierarchy of human needs. He framed this as pyramid, in five horizontal layers. The layers range upward, from safety, through love and belonging, then to esteem, finally to self-actualization at the top. But at the very base of his pyramid, its foundation, Maslow placed our physiological needs, without which we cannot function: water, food, and shelter. These most basic needs must be met before any higher aims can be reached. Without water and food, you wouldn’t care about a mobile phone or a fancy car. In fact, if you didn’t have water and food, you would spend all of your time trying to find water and food. Your world would become very focused and very limited.
When there were small numbers of people, our resources seemed abundant. And similarly, when there were few of us, the pollutants we might produce—smoke from fires or human waste—were easily dispersed into the environment. As our societies have advanced, our demand for resources has climbed—energy, water, and food consumption have grown even faster than our population. Rising life-styles have intensified resource consumption. We may drive or ride, rather than walk. We may eat richer, processed foods. We may replace a bucket and cup by a long hot shower.
But behind this great progress, our growing demand for resources has created unprecedented challenges to the health of our environment. Our growing settlements need more fresh water than local sources can provide. We burn more fuel for energy, and the burning releases gases and particles into our atmosphere, sometimes choking the residents of our cities. Our industries and dwellings release wastes into our rivers and streams. We clear more and more land to grow the food that we need, while we convert more and more farms into cities to house all of us.
The evidence of this strain is all around us, if we look at the data. Climate data in particular show many very disturbing trends:
- The five warmest years of global temperature on record have all come since 2010, and 17 of the 18 warmest have occurred since 2001.
- The frequency of weather-related disasters—cyclones, floods, droughts, and wildfires—has increased by nearly a factor of 3 since 1980.
- Carbon dioxide in our atmosphere, an important heat trapping gas, is at the highest level ever measured, more than 400 ppm. Scientists estimate that this level has not been seen for 3 million years, a time when Earth was several degrees hotter and before the human race had even emerged.
We can see easily that pollution is generated by many small sources: a power plant, a single factory, or even a two-wheeler. But we can also see that the implications are global: atmospheric gases circulate and mix over the entire planet, so that these many small sources add up to a world-wide problem. Climate change does not respect international boundaries. Climate change does not care about things that divide people—religion, race, or money. But solving climate change will require that people of all nationalities, all religions, and all races work together for a global solution. No one can solve this problem by working alone.
Why does climate change matter? A warmer, more variable climate can damage our water and food supplies, those very needs which Maslow told us are most essential.
These are difficult problems, but problems that can be solved.
Intensification of agriculture is part of the solution. Biological science is enabling faster and more effective crop breeding than was possible by the traditional, slow path of hybridization. Better access to fertilizer is being enabled through new technologies, not all of which are complex. For example, engineers at MIT have developed a simple torrefaction reactor that can convert post-harvest waste into fertilizer—an alternative to burning—and this technology has been successfully deployed in Africa and is now being transferred to India.
Apart from supply-side solutions, demand management provides results as well, without the need for new technologies. For example, one-third of the grain grown in the world simply feeds livestock. And some foods, such as meats, require more water to produce. For those who are not vegetarians, even a small movement toward a more plant-based diet can help reduce burden on water and agriculture.
When large amounts of capital can be invested to build and carefully maintain water infrastructure, the unit cost of safe water is often lowest. But many good solutions are not costly or high-tech: something as simple and inexpensive as a check dam that can store enough water to let a farmer grow an additional crop cycle.
We see a rising role for sensors that can detect bacteria in water or on food, and sensors that target arsenic or other toxins. In the near future, a mobile phone may be able to test whether water or food is safe before we consume it. And for food producers, MIT researchers have developed simple sensors to check milk for adulterationand to test soil for nutrients.
Technology for water purification is increasingly precise and increasingly inexpensive. In the near future, we will be able to clean and reuse most waste water, and perhaps even recover valuable resources that are now lost in discharge. Perhaps one day we will even create a very low-cost, point-of-use water treatment that will provide everyone with universal access to clean water.
Of course, any technology is useless if it is too expensive or if people will not accept it. Social context and economics are essential as well. These complex societal problems require interdisciplinary solutions.
I know that the challenges I have outlined seem dire. But I also know that they can be solved, and that they will be solved if we work together. If we work together within our cities or communities, we can solve the problem of having reliable and safe water. If we work together within our states and nations, we can have robust, sustainable agricultural systems to nourish all of our citizens. And if the nations of the world work together, we can control and eventually reverse climate change.
What is required is an understanding amongst us of what the challenges are. What is required is an agreement to look at problems scientifically, and not to let political biases prevent us from acknowledging dangers ahead. What is required is leadership: leadership in our communities, leadership in our businesses, and leadership in our governments.
You ask me: where will these leaders come from? And I answer you: I’ve already met them — in classrooms and lecture halls, labs, start-up competitions, and conferences, all around the world. And as these students graduate and fully enter society, the responsibility to solve these problems will lie with them. And I have every confidence that these young people will rise to the challenge.
J-Clinic: One year of progressOne year on from its inception, MIT/J-Clinic Chair Professor Anantha P. Chandrakasan talks to Opening Doors about progress on this groundbreaking MIT/Community Jameel collaboration. ...Read more
J-WAFS in action – combating food contaminationTim Swager, the John D. MacArthur Professor of Chemistry at MIT, and coworkers, have developed a new way to bring a fast, easy, and affordable food safety sensing technology to industry and consumers. ...Read more
Artistic renaissance redefining our global presenceIt’s never been a better time to be an artist – or an arts enthusiast – in the Middle East. With a rich cultural history, one increasingly unafraid to splice with modern perspectives, the region is attracting the world’s gaze as never before. ...Read more
Developing a new planning model for large water projectsJ-WAFS’ research explores how city planners can best prepare for the uncertainties of climate change. ...Read more
Water flows through the 2018 World Economic Forum Global Risks ReportThis January 2500 delegates and 70 world leaders from 100 different countries braved the heaviest snowfall in decades to meet in Davos, Switzerland at the World Economic Forum (WEF). ...Read more
A war on waste and a spray that stays: J-WAFS cultivates innovation to address pressing food and agriculture problemsA coating that reduces food waste by increasing the shelf life of produce, and a spray that reduces pollution caused by pesticide run-off, are among two of the latest innovations to win recognition from the Abdul Latif Jameel World Water and Food Security Lab (J-WAFS), in the Massachusetts Institute of Technology’s (MIT) second annual Rabobank-MIT Food and Agribusiness Innovation Prize. Picking ...Read more
Securing food and water for allMankind’s most significant issues are being tackled by an elite group of researchers and entrepreneurs at the home of the Abdul Latif Jameel World Water and Food Security Lab (J-WAFS) at Massachusetts Institute of Technology (MIT). The world’s population is predicted to grow by more than two billion by the mid-21st Century, according to the UN Department of Economic and Social Affairs . That ...Read more
Kids in the classroom: Improving education for children in developing economiesNew ways to potentially increase the number of children enrolled in and attending full-time education in low- and middle-income countries have been identified by a comprehensive new report published by the Abdul Latif Jameel Poverty Action Lab (J-PAL), based at the Massachusetts Institute of Technology. The report – Roll Call: Getting Children into School  – drew lessons from 58 randomized ...Read more
J-WAFS in action: providing safe drinking water through woodRohit Karnik, Associate Professor of Mechanical Engineering at MIT, and Amy Smith, Senior Lecturer at MIT’s Department of Mechanical Engineering and founding director of D-Labs at MIT, are leading a group of researchers hoping to harness the natural qualities of xylem wood to provide safe, affordable drinking water to low-income groups. Opening Doors spoke to Rohit Karnik, Amy Smith, and team me ...Read more
J-WAFS in Action: Providing safe, clean milk to rural communitiesPranay Jain is a graduate student in mechanical engineering at MIT, working alongside Professor Sanjay Sarma in the Field Intelligence Laboratory. Pranay is part of a team, funded by the Abdul Latif Jameel Water and Food Security Lab (J-WAFS), that is developing a new low-cost handheld device to test milk quality and safety. Opening Doors spoke to Pranay about the project and its a ...Read more