Because evidence that shows that diesel fumes are more toxic than was previously thought, there has been increased interest in the use of natural gas for vehicles operating in cities. Transit buses, traditionally fueled by diesel, are one of the cheapest forms of mass transit. They are also significant polluters and typically operate in heavily congested urban areas, where significant air pollution problems exist. The report provides an overview of the issues that must be considered when evaluating natural gas an alternative to diesel for use in transit buses.

Welcome to "Breathing Clean: A Journey into Indoor Air Quality." In the modern era, we spend a significant portion of our lives indoors, whether it's at home, work, or in various public spaces. It is within these indoor environments that we expect safety, comfort, and well-being. However, there is an invisible factor that profoundly impacts our lives—indoor air quality (IAQ). This book sets out on a compelling exploration of IAQ, delving into the intricacies of what constitutes clean and healthy air within our indoor spaces. It aims to empower readers with knowledge, insights, and practical solutions to enhance their understanding and take meaningful action to improve the air they breathe. Throughout these pages, we will unravel the mysteries surrounding IAQ, dissecting the sources, pollutants, and potential health effects that can arise from poor air quality. We will explore the science behind IAQ, helping you comprehend the complex interplay between indoor environments and the air we inhale. With a keen focus on education, we will navigate the different aspects of IAQ assessment, providing guidance on how to identify potential risks and understand measurement techniques. We will shed light on the significance of monitoring and how it can shape our decisions and actions to ensure the air we breathe is healthy and safe. While exploring the book, you will encounter various chapters dedicated to the common indoor pollutants that plague our indoor spaces. We will uncover the secrets behind volatile organic compounds (VOCs), particulate matter, mold, radon, and other pollutants that can silently compromise our health and well-being. Moreover, we will examine their sources and equip you with the tools to mitigate and control them. Our journey will continue by focusing on the strategies and technologies available to improve IAQ. From effective ventilation systems to advanced air filtration and purification methods, we will explore a myriad of solutions that can transform the quality of the air we breathe. We will delve into design considerations, sustainability practices, and regulations that shape the IAQ landscape. As we progress through the book, we will highlight the importance of awareness and education in cultivating a culture of healthy indoor environments. We will emphasize the role each individual can play in advocating for clean air and fostering positive change. This book is a call to action, urging you to be proactive in safeguarding your health and the well-being of those around you. It is an invitation to embark on a journey that unveils the importance of breathing clean air and empowers you to take control of your indoor environment. Together, let us embrace the mission of breathing clean, cultivating indoor spaces that prioritize health, and advocating for improved IAQ on a global scale. By the end of this book, it is our hope that you will be armed with the knowledge, motivation, and determination to champion the cause of indoor air quality for a healthier future. So, take a deep breath, join us on this enlightening journey, and let us embark on a quest to breathe clean. Sincerely, Charles Nehme

A New York Times Bestseller A Washington Post Notable Nonfiction Book of 2020 Named a Best Book of 2020 by NPR “A fascinating scientific, cultural, spiritual and evolutionary history of the way humans breathe—and how we’ve all been doing it wrong for a long, long time.” —Elizabeth Gilbert, author of Big Magic and Eat Pray Love No matter what you eat, how much you exercise, how skinny or young or wise you are, none of it matters if you’re not breathing properly. There is nothing more essential to our health and well-being than breathing: take air in, let it out, repeat twenty-five thousand times a day. Yet, as a species, humans have lost the ability to breathe correctly, with grave consequences. Journalist James Nestor travels the world to figure out what went wrong and how to fix it. The answers aren’t found in pulmonology labs, as we might expect, but in the muddy digs of ancient burial sites, secret Soviet facilities, New Jersey choir schools, and the smoggy streets of São Paulo. Nestor tracks down men and women exploring the hidden science behind ancient breathing practices like Pranayama, Sudarshan Kriya, and Tummo and teams up with pulmonary tinkerers to scientifically test long-held beliefs about how we breathe. Modern research is showing us that making even slight adjustments to the way we inhale and exhale can jump-start athletic performance; rejuvenate internal organs; halt snoring, asthma, and autoimmune disease; and even straighten scoliotic spines. None of this should be possible, and yet it is. Drawing on thousands of years of medical texts and recent cutting-edge studies in pulmonology, psychology, biochemistry, and human physiology, Breath turns the conventional wisdom of what we thought we knew about our most basic biological function on its head. You will never breathe the same again.

Our knowledge of breathing has shaped our social history and philosophical beliefs since prehistory. Breathing occupied a spiritual status for the ancients, while today it is central to the practice of many forms of meditation, like Yoga. Over time physicians, scientists, and engineers have pieced together the intricate biological mechanisms of breathing to devise ever more sophisticated devices to support and maintain breathing indefinitely, from iron lungs to the modern ventilator. Breathing supplementary oxygen has allowed us to conquer Everest, travel to the Moon, and dive to ever greater ocean depths. We all expect to breathe fresh and clean air, but with an increase in air pollution that expectation is no longer being met. Today, respiratory viruses like COVID-19 are causing disasters both human and economical on a global scale. This is the story of breathing—a tale relevant to everyone.

THE SUNDAY TIMES BESTSELLING PHENOMENOM 'I've never felt so alive' JOE WICKS 'The book will change your life' BEN FOGLE My hope is to inspire you to retake control of your body and life by unleashing the immense power of the mind. 'The Iceman' Wim Hof shares his remarkable life story and powerful method for supercharging your strength, health and happiness. Refined over forty years and championed by scientists across the globe, you'll learn how to harness three key elements of Cold, Breathing and Mindset to master mind over matter and achieve the impossible. 'Wim is a legend of the power ice has to heal and empower' BEAR GRYLLS 'Thor-like and potent...Wim has radioactive charisma' RUSSELL BRAND

Explores the history of breathing and how it has shaped our social history and philosophical beliefs.