Clean energy is also resilient energy
NASSAU — The Caribbean and its surroundings are on the front lines of climate change. The Bahamas, the archipelago that stretches over the crystal-blue waters between Florida and Cuba, have been battered in recent years by devastating hurricanes, which have increased in severity and frequency as a result of global warming. As is the case worldwide, there is an element of injustice to this. Given that the Bahamas and Caribbean countries emit relatively minuscule amounts of carbon dioxide, their residents bear very little of the blame for the climate crisis.
But the people of the region are now flipping the script, transforming themselves from victims of climate tragedies into global leaders in clean, secure energy. The Caribbean countries have compelling economic reasons for embracing the green-energy transition. For generations, they have relied on imported fossil fuels to power their economies, which means they have long had to deal with the uncertainties of world oil markets and thus significant cost fluctuations for electricity.
Thanks to advances in renewable energies, that economic challenge has created an opportunity. Unlike imported fossil fuels, which are subject to rising costs, the prices of solar power and other clean energy sources, along with the necessary battery storage systems, continue to fall. As these technologies have become more affordable and competitive with older, dirtier fuels, they have created a powerful incentive for island countries to move away from conventional fossil fuel-fired power plants. Moreover, this trend will only grow more pronounced from here on out, as the cost advantages of newer, cleaner energies make them increasingly attractive relative to fossil fuels.
For regions like the Caribbean, solar and battery storage systems do more than simply reduce the costs of electricity; when deployed in the right way, they also improve climate resilience. As the Bahamas and other countries across the region have demonstrated over the past few years, solar- and battery-powered microgrids can provide critical services for island communities during and after severe weather events that otherwise would knock traditional energy sources offline.
But in order for these new energy solutions to provide real resilience, they themselves need to be able to withstand the storms, which tend to ravage power lines and disconnect communities from centralised sources of energy generation. Thus, in the case of solar, much depends on the methods used to secure solar panels to the ground and to rooftops.
We already know that it is possible to construct photovoltaic (PV) systems capable of surviving even the most severe category of hurricane. Through a collaboration between the Rocky Mountain Institute, the government of the Bahamas and the country’s national utility, the Bahamas Power and Light Company, we have developed and installed a solar parking canopy at the National Stadium in Nassau that can withstand the winds of a category-five hurricane. We have also built the country’s first category-five resilient solar and battery storage microgrid on Ragged Island, and are now focusing on designing and delivering sustainable and resilient microgrids for critical facilities on Abaco, following the destruction wrought by Hurricane Dorian in September 2019.
As the planet continues to warm, increased moisture in the air will translate into even more severe and frequent tropical storms and hurricanes. What we saw with Dorian and Hurricane Maria in Puerto Rico in 2017 is likely to become commonplace. Fortunately, as the partnership in the Bahamas shows, many of the same measures needed to build resilience are also those needed to limit greenhouse-gas (GHG) emissions and slow the pace of global warming. Far from requiring a tradeoff, resilient PV systems check both boxes.
The Caribbean and Atlantic are hardly the only regions that will need to build more resilient energy infrastructure to prevent power disruptions. Communities around the world are increasingly confronting the challenges posed by severe and extreme weather, including the devastating fires in Australia, Indonesia and the western United States.
In all of these cases, clean, localised energy solutions offer unique advantages in terms of reducing emissions and keeping the lights on after a disaster. They point the way to a better future for our electricity system. By embracing the clean-energy transition, the Bahamas is setting an example for the rest of the world — and particularly for those countries that are responsible for the overwhelming share of global GHG emissions.
Jules Kortenhorst is CEO of the Rocky Mountain Institute. Whitney Heastie is CEO of Bahamas Power and Light. ©Project Syndicate, 2020.
BONN – In the face of climate change, providing reliable supplies of renewable energy to all who need it has become one of the biggest development challenges of our time. Meeting the international community’s commitment to keep global warming below 1.5-2°C, relative to preindustrial levels, will require expanded use of bioenergy, carbon storage and capture, land-based mitigation strategies like reforestation, and other measures.
The problem is that these potential solutions tend to be discussed only at the margins of international policy circles, if at all. And yet experts estimate that the global carbon budget – the amount of additional carbon dioxide we can still emit without triggering potentially catastrophic climate change – will run out in a mere ten years. That means there is an urgent need to ramp up bioenergy and land-based mitigation options. We already have the science to do so, and the longer we delay, the greater the possibility that these methods will no longer be viable.
Renewable energy is the best option for averting the most destructive effects of climate change. For six of the last seven years, the global growth of renewable-energy capacity has outpaced that of non-renewables. But while solar and wind are blazing new trails, they still are not meeting global demand.
A decade ago, bioenergy was seen as the most likely candidate to close or at least reduce the supply gap. But its development has stalled for two major reasons. First, efforts to promote it had negative unintended consequences. The incentives used to scale it up led to the rapid conversion of invaluable virgin land. Tropical forests and other vital ecosystems were transformed into biofuel production zones, creating new threats of food insecurity, water scarcity, biodiversity loss, land degradation, and desertification.
In its Special Report on Climate Change and Land last August, the Intergovernmental Panel on Climate Change showed that scale and context are the two most important factors to consider when assessing the costs and benefits of biofuel production. Large monocultural biofuel farms simply are not viable. But biofuel farms that are appropriately placed and fully integrated with other activities in the landscape can be sustained ecologically.
Equally important is the context in which biofuels are being produced – meaning the type of land being used, the variety of biofuel crops being grown, and the climate-management regimes that are in place. The costs associated with biofuel production are significantly reduced when it occurs on previously degraded land, or on land that has been freed up through improved agriculture or livestock management.
Under the 1.5°C warming scenario, an estimated 700 million hectares of land will be needed for bioenergy feedstocks. There are multiple ways to achieve this level of bioenergy production sustainably. For example, policies to reduce food waste could free up to 140 million additional hectares. And some portion of the two billion hectares of land that have been degraded in past decades could be restored.
The second reason that bioenergy stalled is that it, too, emits carbon. This challenge persists, because the process of carbon capture remains contentious. We simply do not know what long-term effects might follow from capturing carbon and compressing it into hard rock for storage underground. But academic researchers and the private sector are working on innovations to make the technology viable. Compressed carbon, for example, could be used as a building material, which would be a game changer if scaled up to industrial-level use.
Moreover, whereas traditional bioenergy feedstocks such as acacia, sugarcane, sweet sorghum, managed forests, and animal waste pose sustainability challenges, researchers at the University of Oxford are now experimenting with the more water-efficient succulent plants. Again, succulents could be a game changer, particularly for dryland populations who have a lot of arid degraded land suitable for cultivation. Many of these communities desperately need energy, but would struggle to maintain solar and wind facilities, owing to the constant threat posed by dust and sandstorms.
In Garalo commune, Mali, for example, small-scale farmers are using 600 hectares previously allocated to water-guzzling cotton crops to supply jatropha oil to a hybrid power plant. And in Sweden, the total share of biomass used as fuel – most of it sourced from managed forests – reached 47% in 2017, according to Statistics Sweden. Successful models such as these can show us the way forward.
Ultimately, a reliable supply of energy is just as important as an adequate supply of productive land. That will be especially true in the coming decades, when the global population is expected to exceed 9.7 billion people. And yet, if global warming is allowed to reach 3°C, the ensuing climatic effects would make almost all land-based mitigation options useless.
That means we must act now to prevent the loss of vital land resources. We need stronger governance mechanisms to keep food, energy, and environmental needs in balance. Failing to unleash the full potential of the land-based mitigation options that are currently at our disposal would be an unforgiveable failure, imposing severe consequences on people who have contributed the least to climate change.
Bioenergy and land-based mitigation are not silver bullets. But they will buy us some time. As such, they must be part of the broader response to climate change. The next decade may be our last chance to get the land working for everyone.