Richard H. Schwartz
Vegan, climate change,and social justice activist

Celebrating Tu Bishvat as if Environmental Sustainability Matters 

Since Tu Bishvat, the “New Year for Trees,” has increasingly become a “Jewish Earth Day,” why not use Tu Bishvat Seders as, among other things, a time to consider how we can effectively respond to current environmental crises that threaten all life on the planet?

The world is rapidly heading toward a climate catastrophe, severe food, water, and energy scarcities, and other environmental disasters. This is a strong consensus of almost all climate scientists, science academies worldwide, and virtually all peer-reviewed articles on the issue in respected scientific journals..

The hottest year worldwide since temperature records have been kept in 1880 was in 2020, which tied 2016, which broke records previously set in 2014 and then 2015. Every decade since the 1970s has been warmer than the previous decade. All 23 of the hottest years worldwide have occurred since 1998. The past eight years are the hottest in recorded history.

Polar ice caps, glaciers and permafrost are melting faster than the worst-case predictions of climate experts. There has been a recent significant increase in the number and severity of heat waves, droughts, wildfires, storms, and floods. There have been so many severe climate events in California recently that their governor Jerry Brown declared, “humanity is on a collision course with nature.” Military experts see climate change having a potential multiplier effect for instability, terrorism, and war as tens of millions of desperate, hungry refugees flee from severe climate events.

Everything possible should be done to avert a climate catastrophe and other environmental disasters, because if we don’t avert it, nothing else will matter. Saving the global environment should become a central concern for civilization today, and tikkun olam (the healing of the world) should become a major focus for all of Jewish life today.

Time is running out for efforts to avert the potential catastrophes. Climate experts believe that we may be very close to an irreversible tipping point, when climate change will spiral out of control with disastrous consequences. While many climate experts think that 350 parts per million (ppm) of atmospheric CO2 is a threshold value for avoiding a climate catastrophe, we reached 420 ppm in 2022 and are experiencing an increase of two to three ppm per year. While climatologists think that an increase of over two degrees Celsius would be disastrous, climate experts project that we are on track to have an increase of at least three degrees Celsius, unless major changes soon occur.

Among the many necessary changes, reducing consumption of meat and other animal products is something everyone can do to meaningfully address the problem of climate change. A 2006 UN  old and Agriculture Organization report, “Livestock’s Long Shadow,” indicated that animal-based agriculture emits more greenhouse gases (GHGs), in CO2 equivalents, than is emitted by all the cars, planes, ships, and other means of transportation worldwide combined. A 2009 cover article in World Watch magazine, “Livestock and Climate Change,” by two environmentalists associated with the World Bank, argued that the livestock sector is responsible for at least 51 percent of all human-induced GHGs. This is largely due to the massive destruction of tropical rain forests to produce pasture land and land to grow feed crops for animals and the emission of methane from farmed animals. During the 10 – 20-year periods that methane remains in the atmosphere it is about 84 times as potent in causing warming than CO2 per about weight.

Tu Bishvat is an ideal time to start a dietary shift since the Tu Bishvat Seder in which fruits and nuts are eaten, along with the singing of songs and the recitation of Biblical verses related to trees and fruits, is the only sacred meal where only vegetarian, actually vegan, foods are eaten as part of the ritual. Such a shift would be consistent with basic Jewish teachings on protecting human health, treating animals with compassion, preserving the environment, conserving natural resources, and helping hungry people.

Despite all of the above and much more, there is great denial out there and far from enough is being done to try to avert the potential catastrophes. Most people seem to be “rearranging deckchairs on the Titanic, as we head toward a giant iceberg.”

In response to the above points, Jews, preferably in alliance with others, should play a major role in increasing awareness of the threats and how the application of Jewish values, including a shift toward vegan diets, can make a major difference. This would help show the relevance of Judaism’s eternal teachings and help shift our imperiled planet onto a sustainable path, so we can leave a decent world for future generations.

About the Author
Richard H. Schwartz, Ph.D., is the author of Judaism and Vegetarianism, Judaism and Global Survival, Who Stole My Religion? Revitalizing Judaism and Applying Jewish Values to Help Heal our Imperiled Planet, and Mathematics and Global Survival, and over 200 articles and 25 podcasts at He is President Emeritus of Jewish Vegetarians of North America (JVNA) and President of the Society of Ethical and Religious Vegetarians (SERV). He is associate producer of the 2007 documentary “A Sacred Duty: Applying Jewish Values to Help Heal the World.” He is also a Professor Emeritus of Mathematics at the College of Staten Island, which is part of the City University of New York.
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