Numbers Don't Lie

The book "Numbers Don't Lie" by Václav Smil offers a unique insight into the workings of the world through accurate data and statistics. The author explores 71 diverse topics that underpin modern society, from energy, demographics and nutrition to technological innovation and transport. He builds his analysis on numbers to help us understand complex issues and their contexts. As a result, the reader learns not only the facts but also surprising connections between seemingly unrelated areas of life. The book is not just a summary of data - Smil leads us to think about how our choices affect the world and offers guidance on how to meet the challenges of the future.

At a time when the world is turning to electric cars as a solution to the climate crisis, it's easy to succumb to the illusion that replacing traditional internal combustion engines with electric ones is a panacea for pollution. While electric cars do indeed reduce carbon dioxide emissions during operation, the reality of their ecological footprint is far more complex. The energy intensity of producing these vehicles, especially the batteries, raises important questions that cannot be ignored. The production of lithium-ion batteries, a fundamental component of electric vehicles, requires large quantities of raw materials such as lithium, cobalt and nickel. Their extraction often takes place in countries where environmental standards and working conditions fall short of global standards. In the Democratic Republic of Congo, for example, nearly 70% of the world's cobalt comes from mining, with devastating impacts on local communities and the environment. Another important factor is the source of electricity used for charging. If the electricity comes from coal-fired power stations, the contribution of electric cars to reducing the carbon footprint is dramatically reduced. For example, China, where there is a high proportion of electricity generation from coal, may paradoxically have higher emissions per kilometre for electric cars than some countries with efficient internal combustion engines and clean energy sources. Despite these problems, electric cars remain a key part of the fight against climate change. The development of renewable energy sources, such as solar and wind power, and the continuous improvement of battery production efficiency are promising pathways to sustainability. Norway is a case in point, where the majority of electricity is generated from hydropower, ensuring that electric cars are a truly green solution. Beyond the environmental challenges, electric cars are becoming an instrument for socio-economic change. Cities such as Amsterdam and Los Angeles are already introducing low-emission zones where only electric or hybrid vehicles are allowed. These moves are forcing manufacturing giants to innovate, which could lead to wider availability of the technology for countries outside the Western world. However, the introduction of electric vehicles should not be seen as an end in itself, but rather as part of a wider solution. True sustainability lies in a combination of technological progress, systematically reducing energy consumption and building infrastructure to support renewables. This is the only way to avoid electric cars becoming another source of problems rather than a solution.

Demographic change is one of the most significant phenomena affecting today's society. In recent decades, we have seen a dramatic increase in life expectancy and a decline in birth rates, leading to an ageing population. This process, which is usually associated with economically developed countries, is now also affecting many emerging economies. However, what impact is population ageing having on the quality of life and the future of humanity? One of the most visible impacts of population ageing is the pressure on health and social systems. In Japan, for example, where more than 28% of the population is over 65, both government and the community have to deal not only with healthcare expenditure, but also with loneliness and isolation among the elderly. We see a similar trend in Europe, where the growing number of seniors requires new approaches to social services and infrastructure. At the same time, declining birth rates are affecting economies. Fewer young people means a smaller workforce, which can lead to slower economic growth. Germany, which has one of the lowest birth rates in Europe, is investing billions in automation and robotics to compensate for labour shortages. However, these technologies cannot replace an important aspect of human society - interpersonal relationships. At the same time, the ageing of the population raises questions of interpersonal solidarity. Pension systems that rely on workers' contributions are increasingly under pressure. In some countries, such as France, attempts to reform pension systems are sparking widespread protests. The debate on intergenerational fairness is becoming increasingly acute. Despite these challenges, there are also positive aspects of ageing. Older people are often the bearers of wisdom, experience and cultural heritage. Communities that are able to involve seniors in social and working life can gain significant added value. In Sweden, for example, seniors are often involved in voluntary activities, contributing to social cohesion and intergenerational understanding. However, quality of life depends not only on economic and social factors, but also on access to technology and education. Digitisation can help older people to overcome barriers, whether it is telemedicine, online learning or simply being able to stay in touch with family. The challenge remains to ensure that technology is accessible and user-friendly for all. Demographic changes mirror the evolution of society. They show how we can adapt to new challenges and how we can improve the quality of life, not only for current generations, but also for future ones. The future depends on our ability to create an inclusive and fair society where age is not a barrier but an opportunity.

Technological innovation is one of the greatest drivers of modern civilisation. From the invention of the steam engine to electrification to the digital revolution, humanity has undergone incredible developments that have fundamentally changed the way we live, work and communicate. But despite these achievements, the question arises: are all innovations really beneficial, or do some bring more problems than solutions? History is replete with examples where technological breakthroughs have fundamentally changed the world. Electrification, which began to spread in the late 19th century, dramatically increased productivity and improved living conditions. A case in point is Detroit, where the mass production of cars thanks to Henry Ford's caterpillar not only transformed the economy but also created a new way of life - mobility for the masses. Today, however, cars are also a source of traffic congestion and pollution. In modern times, one of the most talked about innovations is artificial intelligence (AI). AI has already permeated various fields, from healthcare to finance to everyday applications such as virtual assistants. While these technologies bring incredible possibilities, for example in diagnosing diseases or automating routine tasks, they also raise concerns. What will be the implications for the labour market? Can society adapt to a world where robots replace millions of jobs? One of the paradoxes of technological progress is that innovations often solve problems of our own making. For example, plastic materials, which have enabled the mass production and availability of many products, now pose one of the greatest environmental threats. Efforts to replace plastics with biodegradable materials are promising, but the question remains whether we can reverse the damage that has already been done. However, technology is not only affecting our material world, but also our social structures. Social media, which was originally intended to bring people together, now often faces criticism for polarising society and spreading misinformation. Nevertheless, they are also a tool for mobilising and spreading awareness, as the climate protests led by the young generation have shown, for example. The future of technological innovation depends on our ability to manage it ethically and sustainably. We need to invest in education and infrastructure to enable people to keep up with technological developments. Innovation is neither good nor bad in itself - its benefits depend on how we implement it and what values we prioritise in doing so. The development of technology is an integral part of human existence, but its true value will only be realised if it serves as a tool to improve the quality of life for all, not just for a select few. So the real challenge remains to strike a balance between progress and sustainability.

Transport is an integral part of the modern world. From the first ships that enabled the discovery of new continents to today's high-speed trains and planes, mobility technologies have fundamentally changed the way we live, trade and travel. But transport is not just a symbol of progress - it is also one of the greatest environmental challenges of our time. In the 20th century, transport experienced its greatest boom. The automobile revolution, started by Henry Ford, made it possible for millions of people to own a car. This change has fundamentally transformed both cities and the countryside. Los Angeles is an example of a city that was designed with an emphasis on automobile infrastructure. Today, however, this model is proving problematic - massive traffic congestion, air pollution and urban problems are the consequences. Global mobility today depends on air transport, which is crucial for both trade and tourism. However, aircraft are among the largest emitters of greenhouse gases. In 2019 alone, aviation accounted for more than 2% of global CO₂ emissions. While initiatives such as the use of biofuels or the development of electric aircraft offer promising solutions, their implementation is still at an early stage. Rail transport is a more energy-efficient and environmentally friendly alternative. High-speed trains, such as the Japanese Shinkansen or the French TGV, show that train transport can be both efficient and comfortable. Yet its spread is limited by high infrastructure costs, especially in countries with large territories such as the United States. Urban mobility is another important aspect. In cities such as Copenhagen and Amsterdam, bicycles are predominant, with both environmental and health benefits. On the other hand, big cities like Beijing or Delhi still face challenges related to high levels of motorisation and smog. Modern solutions include electric buses, shared scooters and the development of metro systems. But transport is not just about technology, it is also about cultural change. Examples are initiatives to reduce dependence on cars, such as 'Car Free Day' or the introduction of low emission zones. Countries such as Norway are planning to ban the sale of internal combustion engine cars by 2025, sending a clear signal to move towards sustainable forms of transport. The future of transport lies in a combination of innovation and behavioural change. Autonomous cars, electrification, shared mobility and the development of public transport can help reduce the ecological footprint, but their success depends on public support and political will. Transport is a mirror of our society - it shows us where we are going and reminds us that the journey must not only be fast but also sustainable.

Nutrition and agriculture are the cornerstones of human civilisation. From the beginning of the agricultural revolution some 10 000 years ago to today's intensive forms of food cultivation, humanity has continually sought ways to feed a growing population. Although modern agriculture has brought unprecedented increases in productivity, its impact on the environment and the quality of nutrition raises serious questions. Over the last hundred years, agricultural production has increased exponentially. Mechanisation, chemical fertilisers and genetic modification have made it possible to grow crops on a scale previously unimaginable. An example is the Green Revolution in the 20th century, which helped double wheat and rice yields in developing countries such as India and Mexico, preventing massive famine. But this progress has come at a price. Intensive agriculture is one of the biggest producers of greenhouse gases, consumes vast amounts of water and causes land degradation. For example, the cultivation of soya and palm oil is contributing to the deforestation of the Amazon rainforest, with global consequences for biodiversity and the climate balance. Moreover, the current food system creates a paradox of abundance and scarcity. On the one hand, more than 800 million people in the world are undernourished, while on the other, the epidemic of obesity and diseases linked to poor diets is a major problem in developed countries. A case in point is the United States, where more than a third of the adult population is obese, while millions of people depend on food banks. Alternative approaches, such as organic farming or regenerative cultivation, offer solutions that are more environmentally friendly. Although such methods are not yet capable of replacing intensive agriculture on a global scale, they are gradually gaining support. An example is Denmark, where more than 10% of agricultural land already uses organic cultivation methods. Changing dietary habits is also an important part of the solution. Promoting local production, reducing food waste and changing to a more plant-based diet can help alleviate pressure on the global food system. Initiatives are already emerging in Europe to encourage the consumption of seasonal and local food, which not only reduces the carbon footprint but also supports local farmers. The future of food and farming requires innovative solutions that combine technological progress with environmental responsibility. If we can strike a balance between productivity and sustainability, we can create a system that provides enough quality food for all without compromising the future of the planet. However, the path to this goal is through global cooperation, education and a willingness to change established approaches.

"Numbers Don't Lie" is an exceptional book that reveals the hidden dynamics of our everyday lives through facts and logical connections. Václav Smil offers not only answers to questions about the state of the world, but also a perspective that forces the reader to consider the deeper implications of our actions. Energy consumption, an ageing population, technological innovation and the challenges of the global food system are just some of the topics that show how closely everything is interconnected. The book underlines that a sustainable future depends on our ability to read between the lines of statistics and make decisions based on an understanding of the facts. "Numbers Don't Lie" is an important contribution to the debate on how to build a better and more sustainable world. Do you have feedback for us? We'd love it if you let us know your opinion on our content! Just send an email to feedback@rewio.app with the title of this book in the subject line and share your impressions!