Twenty-five years ago, scientists feared that our rapid population growth and economic growth were stressing Earth’s ecosystems “beyond their capacities to support the web of life,” and that we were “fast approaching many of the limits of what the biosphere can tolerate without substantial and irreversible harm.”
But despite these dire warnings, scientists aren’t without hope. They point to ozone depletion as an example of reversing humanity’s impact on the environment, and they also note that extreme poverty and hunger have diminished globally, while investments in girls’ and women’s education have contributed to more stable fertility rates.
The authors also note that the renewable energy sector has rapidly grown since 1992, and that some regions have successfully limited deforestation.
But these measures alone aren’t enough. As such, Ripple and his coauthors present 13 different strategies for moving towards sustainability, including: establishing well-funded nature reserves, reducing food waste through education and infrastructure, promoting dietary shifts towards plant-based foods, developing green technologies, and establishing economic incentives to shift patterns of consumption.
Few of these changes can happen without popular support, however, and the authors argue that scientists, media influencers and regular citizens must take action “as a moral imperative to current and future generations of human and other life.”
“Scientists are in the business of analyzing data and looking at the long-term consequences,” Ripple said in a release. “Those who signed this second warning aren’t just raising a false alarm. They are acknowledging the obvious signs that we are heading down an unsustainable path. We are hoping that our paper will ignite a widespread public debate about the global environment and climate.”
In the letter’s conclusion, Ripple writes: “We must recognize, in our day-to-day lives and in our governing institutions, that Earth with all its life is our only home. … Working together while respecting the diversity of people and opinions and the need for social justice around the world, we can make great progress for the sake of humanity and the planet on which we depend.”
If you’re a scientist reading this, you can sign the “second notice” here, and join The Alliance of World Scientists (AWS), a new international assembly of scientists founded by William Ripple, which is independent of both governmental and non-governmental organizations and corporations.