Romário Schaefer is fattening up 3,300 pigs that he receives when they weigh around 22 kg and returns when they reach 130 to 160 kg - a huge increase in meat and profits for their owner, a local meat-processing plant in this city in Brazil.
Reyna Díaz cooks beans, chicken, pork and desserts in her solar cooker, which she sets up in the open courtyard of her home in a poor neighborhood on the outskirts of this town in southwestern Mexico.
Pigs, already the main source of income in this small municipality in southwestern Brazil, now have even more value as a source of electricity.
On the outer edges of Buenos Aires proper, where the paved streets end and the narrow alleyways of one of Argentina’s largest shantytowns begin, visitors can find the En Haccore soup kitchen.
"This is the best thing ever invented for the poor," says Emanuel del Monte, pointing to a tank covered in black tarps protruding from the roof of his house. It forms part of a system built mostly from waste materials, which heats water through solar energy and is improving lives in Argentina.
Children from the neighboring municipalities of Ovalle and Río Hurtado in northern Chile are harvesting rain and recycling greywater in their schools to irrigate fruit trees and vegetable gardens, in an initiative aimed at combating the shortage of water in this semi-arid region.
Because the government has never provided them with electricity, indigenous communities in the mountains of northwest Guatemala had no choice but to generate their own energy.
Jamaica and other Small Island Developing States (SIDS) are embracing renewable energy as part of their plans to become decarbonised in the coming decades.
In the stifling heat, Diego Matom takes the bread trays out of the oven and carefully places them on wooden shelves, happy that his business has prospered since his village in northwest Guatemala began to generate its own electricity.
A large steel wheel, 14 meters in diameter and 1.3 meters wide, could be the energy solution of the near future, generating 3.5 megawatts - enough to supply a city of 30,000 people, according to a company in the capital city of the state of Amazonas in northwest Brazil.
Two military-inspired initiatives are leading Brazil's new government, which includes a number of generals, down the path of mega-projects, which have had disastrous results in the last four decades.
"Look at this water. Would you drink it?" asks José Pablo Zubieta, as he shows a glass he has just filled from a faucet, where yellow and brown sediment float, in his home in Villa La Cava, a shantytown on the outskirts of Argentina's capital.
A school in the capital of Easter Island (Rapa Nui, in the local indigenous tongue) gives an example of clean management with the use of solar energy, rainwater recovery and an organic vegetable garden, as well as rooms and spaces built with waste materials.
Solar panels shine on the rooftop terraces of 10 neat buildings with perfectly straight lines and of uniform height, an image of modernity that contrasts with the precariously-built dwellings with unplastered concrete block walls just a few metres away, with rooms added in a disorderly manner, surrounded by a tangle of electric cables.
Social organisations in the central Mexican municipality of Yecapixtla managed to halt the construction of a large thermoelectric plant in the town and are now designing a project to convert the installation into a solar panel factory, which would bring the area socioeconomic and environmental dividends.
“We can’t work just to pay the electric bill,” complained José Hilario dos Santos, president of the Residents Association of Morro de Santa Marta, a favela or shantytown embedded in Botafogo, a traditional middle-class neighborhood in Rio de Janeiro.
Black plastic pipes, readily available on the mainly empty shelves of Cuba’s shops, distribute biogas to homes in the rural town of La Macuca, buried under the ground or running through the grass and stones in people’s yards.
"Solar energy makes my happiness complete," said Divina Cardoso dos Santos, owner of one of 740 houses with photovoltaic panels on the rooftops in a settlement on the outskirts of this central Brazilian city.
"If thousands of people flock to this town, how will we be able to service them? I'm afraid of that growth," Zendy Euán, spokeswoman for a community organisation,said in reference to the Mayan Train (TM) project, a railway network that will run through five states in southern Mexico.
For the first time in her life, retired physical education teacher Elizabeth Ribeiro planted a tree, thorny papaya, native to Brazil's central savanna.
Thirty families from a rural community more than 4,300 meters above sea level will have warm houses that will protect them from the freezing temperatures that each year cause deaths and diseases among children and older adults in this region of the southeastern Peruvian Andes.