A beach in Beirut 12/03/2019. Source: The New York Times.

The Hillville fire in Australia, 11/03/2019. Source: The New York Times.

Our anthropocene world is rapidly becoming a post-industrial wasteland, where most people are impoverished, left behind, and may not know how to live with dignity. These desperate individuals need a framework to counteract the bad things that are happening in their lives, and they need basic means of survival: a functioning family, home, medical care and decent education for their children. In too many countries, including the US and UK, poverty and desperation lead to voting decisions that are suicidal. Similarly, so many of the educated and affluent people are disoriented and running scared, because they too do not understand the deep and complex connections between the human economy and nature.Over the last twelve years, my small-scale solution to this overwhelming problem has been to teach a class that brings many of the elements of human-nature interactions together and roots them in science, mostly in thermodynamics. This semester I had 25 graduate students in my class, plus 2 graduating PhDs, who audited the class. One of these two senior students explicitly disobeyed her thesis advisor, a well-known marine biologist, who did not want her to sit in my class. Hmm...For so many of you out there seeking enlightenment and guidance, it might be helpful to learn how in three months my class has changed the young lives; all for the better I hope.What follows is a slightly edited essay of a female student, S. A., a biologist.Someday in 2012, it was the first day I knew about Saudi population statistics in terms of age groups. I was around 17 back then. The graphs were comparing with other countries age distribution of the Saudi population. Saudis below 18 years group was the highest in that graph. The statistics were in a Saudi high school biology book, and I cannot remember in which context they were used. But I remember clearly my teacher trying to deliver the message that overpopulation is catastrophic for societies and we need to stop it. However, all in the class, including me, were convinced that being too many is a good thing because we will have more great minds to build our country. Obviously, the teacher had a great message but she failed to deliver it to a younger audience eager to enter adult life.When I joined college, my view of our ridiculously growing population has changed, because I faced the consequences of it. I had to spend many hours daily stuck in traffic. In addition, at that time I started to notice the lack of job opportunities and the high competition for average income jobs. All of this was because we are too many.Similarly, I knew about global warming. They taught us that greenhouse gases trap heat radiated by the earth, and all of the implications associated with that. However, they did not teach us how to reduce our emissions. Since temperature in Saudi Arabia gets really hot, I could not think back then of a way to reduce my emissions except for not using refrigerator and air-conditioning, which is impossible. In addition, I could not live carless because cars are the only transportation option in Saudi. Thus, all of what I had back then were small pieces of information and unsolved problems that did not have a direct effect on my daily life. Moreover, drying of oil reservoirs is a well-known Saudi knowledge/ nightmare, so I knew about it from an early age. But, the future drying of oil reservoirs did not affect me directly so I did not spend time thinking about it. I thought it was a problem my grandchildren would deal with.Early in this class, I finally was able to connect all the previous knowledge I have with their consequences on me and on millions of people. This course has helped me to have a clear picture of my actions and their effect on the environment. For instance, in the first assignment we were required to calculate our water, electricity, and gas consumption, which I never thought of in my life. In class, we compared our personal consumptions, and I discovered that my household had the highest water consumption. My household's high water consumption was due to the watering of our large garden (mostly trees). So, after class I had this long discussion with my family about it and whether they prefer clear air around our house or less carbon emission (from water desalination plant) to the world, they chose the former of course! However, this discussion shed light on the consequences of the daily actions my family practice and take for granted.The second assignment was about mitigation of climate change. The article suggested four actions ones should do to decrease his carbon emission significantly. The article also discussed the lack of awareness about those high impact actions in school textbooks, which was the issue I faced when I learned about global warming at school. They presented problems without suggesting actions to at least reduce them.I consider the third assignment to be a wakeup call for me. In that assignment, we calculated global power production and consumption of fossil fuels and we compared it with power produced from renewables. We were able to conclude by numbers that renewables would not ever replace fossil fuels at our current energy consumption. Moreover, this assignment made me think critically about any product or project marketed as “environment friendly” or “green.” Nevertheless, when I saw the global population growth plotted against power consumption, everything became clear to me. Pollution, global warming, traffic, unemployment all are because of us. It is because of our overpopulation and energy overconsumption. Although this seems obvious, I think that many people are like me: they have the knowledge but they never connect the dots, because what happens with the world does not seem to affect them at present. There is something in human nature to prioritize things based on their present or future effects. This course made me realize that everything is connected to everything and that my present actions will affect people in other countries and will affect the subsequent generations.Thus, in my opinion, successful teaching is not about delivering knowledge, but it is about the way of delivering the knowledge. In order to make change, school teachers must be trained to simplify the message in a way that makes it stick in the younger generation's minds, rather than delivering random facts about the environment and global warming.In conclusion, my attitude toward many things changed after taking this course. I started to use reusable shopping bags, turn off all lights in my room, even though I know that these actions have low impact. I started to read more about this subject, more precisely about the biological effects of plastic accumulation. Shockingly, in a recent study, I read they found that plastic nanoparticles enter the living organisms and have serious negative effects mostly on the reproductive system. What is more shocking is that the effects of plastics are transgenerational, meaning that if plastic nanoparticles enter a living organism, its subsequent offspring will be affected by the plastic, even though they have not encountered the plastic nanoparticles directly. Moreover, I am trying to decrease my aviation and I have decided not to have children. Also, I am trying to take an active role in society and raise awareness about spaying stray cats instead of eliminating them by unethical means.