the future belongs to the tropics
But before continuing with the topic, we need to answer the following question: “What are the Tropics?”. According to the United Nations, “the Tropics are a region of the Earth, roughly defined as the area between the tropic of Cancer and the tropic of Capricorn”. We also know that “although topography and other factors contribute to climatic variation, tropical locations are typically warm and experience little seasonal change in day-to-day temperature”. Finally, it’s interesting to remark that “an important feature of the Tropics is the prevalence of rain in the moist inner regions near the equator, and that the seasonality of rainfall increases with the distance from the equator”.
If we want to clarify more about what is this region and what is a tropic, we might check the definition by the State of the Tropics (James Cook University). Here we’re told that “the Tropics is commonly defined as the region of the Earth surrounding the Equator within the latitudes of the Tropics of Cancer and Capricorn at +/– 23.5 degrees. With its origins in astronomy, these latitudes are the limit of where the Sun reaches a point directly overhead at least once during the solar year, and are used to define the Tropics in this paper.”
And now, what is the paper they’re talking about? It’s the State of the Tropics Report, released every year (in a focus and short version) since 2014 by different universities and research institutions to raise awareness about the situation and the issues this region faces, and also about its importance for the World’s sustainable development. A major report is published every 5 years. It’s self-defined as a report that “analyses a range of environmental, social and economic indicators to answer this question. The analysis shines a bright light on a variety of key issues and provides a foundation for policymakers, geopolitical analysts and other stakeholders to examine in greater detail the tropics and the major issues affecting it”.
Marking the anniversary of the first report’s release on 29 June 2014, in which 12 leading tropical research institutions collaborated, the United Nations General Assembly adopted in 2016 a resolution, “which declared that 29 June of each year is to be observed as the International Day of the Tropics”.
Some interesting factors about this region noted in the State of the Tropics Report 2022 (which was focused on the impact of COVID-19) are:
- Major increases in plastic waste from discarded PPE and food containers have reversed many of the plastic recycling gains made in recent years.
- Reductions in noise and air pollution during the pandemic have been linked with behavioral changes in some migratory birds. Increases in bird diversity and increased residence times were observed in India and Colombia.
- There are concerns that the increased production and use of sanitizers and disinfectants are having impacts on the ecology and health of the soil and aquatic biota.
- Wildlife trafficking and tropical deforestation increased in Brazil, Colombia and Cambodia during the pandemic.
- CO2 emissions in the Tropics decreased by almost 6% over this period, with emissions in Central America decreasing by 17%. The decrease in CO2 emissions in the rest of the world was lower despite having higher overall emissions.
- Globally, CO2 emissions decreased by almost 5% between 2019 and 2020 due to economic lockdowns and border closures. However, this reduction was only temporary, with emissions increasing back to pre-COVID levels by the end of 2021.
Also on a global scale, this report highlighted the fact that “the 2020 decreases in CO2 emissions were largely reversed in 2021 with a 4.9% increase (Adler, 2021). Increases in coal consumption by major CO2 emitters, including China, India, the USA and the European Union, were the major contributors to the rebound in emissions in 2021 (Adler, 2021). To achieve net zero by 2050, it is estimated that CO2 emissions need to be reduced by 1,400 million tonnes per year—equivalent to the decrease in emissions in 2020”.
From the previous report, published in 2021, we should mention some significant data such as:
- The Tropics host nearly 95% of the world’s mangrove forests by area and 99% of mangrove species.
- The Tropics have just over half of the world’s renewable water resources (54%), yet almost half their population is considered vulnerable to water stress.
- Biodiversity is greater in the Tropics – however, loss of biodiversity is also greater in the Tropics than in the rest of the world.
In addition, the United Nations reminds us that “by 2050, the region will host most of the world's people and two-thirds of its children”.
With these and more points it is clear the key role of this region in the achievement of the 17 Sustainable Development Goals, so by helping and taking care of the Tropics we are supporting the whole world and taking care of our common future, that is only possible through proper sustainable development, endorsed by values such as equality and social justice, and key factors like digital transformation and ecological transition.