When summer arrives, the bedroom often becomes an oven. That unbearable feeling of burning sheets and a bed that never seems to cool down is a daily occurrence on those so-called tropical nights, where the temperature rarely dips below 20°C. For many of us, the only solution is to turn on the air conditioning, even though we know this will hit our wallets and, sadly, the environment.
The problem is that we're trapped in a vicious cycle: we use energy to cool our homes, but if that electricity comes from polluting sources, we're fueling global warming , which makes these nights increasingly frequent and extreme. However, there is a way out based on the circular economy, which involves transforming the waste we already generate into the energy needed to stay cool.
The true cost of fighting the heat
It's not just a matter of comfort, but of numbers. A standard air conditioning unit can consume up to 9,6 kilowatts in a single night, which translates into a considerable monthly expense that varies depending on the electricity rate and the type of home. Although a fan is much cheaper and consumes a fraction of that energy, the reality is that it doesn't lower the air temperature, it simply circulates it, which is insufficient when the heat is stifling.
This increase in refrigeration use could drive global electricity consumption up by as much as 72% in areas like the Mediterranean. The key to reversing this trend is to diversify renewable energy sources , since relying solely on solar power could saturate the land with photovoltaic panels.
Residual biomass as a cooling engine
In regions with strong agricultural activity, such as Andalusia, we have a forgotten gold mine: waste. Elements like olive prunings, olive pits, and nut shells can be transformed into electricity or thermal heat through proper management and utilization of plant waste . This is not a utopian ideal; there are already international examples, such as at Morris University in Minnesota, where corn stover fuels systems that provide both heating and cooling.
The most curious finding is that research shows that the areas with the most available biomass are precisely those where tropical nights occur earlier. This means that the solution and the problem lie in the same place. Harnessing this waste would allow for more flexible management than solar or wind power, since biomass as a renewable energy source can be stored and used according to the actual demand of the population.
Cooler cities and healthier habits
It's not all about generating energy; we also need to stop wasting it. It has been proven that the presence of water and vegetation in urban areas can reduce the occurrence of tropical nights by 17%. Designing cities that breathe is essential so that we don't need to have the air conditioning blasting all night.
On a personal level, rest is seriously compromised when we fail to lower our internal body temperature, which disrupts our circadian rhythms and leads to irritability and chronic fatigue . To combat this, experts recommend following some basic guidelines:
- Keep the room temperature between 19°C and 21°C to facilitate sleep induction.
- To give one Take a warm shower or refresh your wrists and ankles before going to bed to dissipate body heat.
- Opt for natural textiles such as linen or cotton, avoiding synthetic fibers that do not allow the skin to breathe.
- Manage ventilation by closing blinds during the day and opening windows only when it is cooler outside.
- Eat a light dinner and wait at least two hours before going to bed, because Heavy digestion raises the temperature of the organism.
- Maintain constant hydration throughout the day, but moderate fluid intake just before bed to avoid unnecessary awakenings.
The combination of smart energy planning, which integrates the use of agricultural waste, and greener urban design, along with rigorous sleep hygiene, is the only way to cope with extreme summers without jeopardizing the planet or our health. Integrating residual biomass into our electrical grid would allow us to sleep soundly, knowing that we are closing the waste loop sustainably.
