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.
"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.
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.
Social activists and local authorities in Rapa Nui or Easter Island are calling for urgent action to address rising sea temperatures, declining rainfall, and rising tides that threaten their fishing resources and their Moais, the mysterious volcanic stone monoliths.
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.
At a brisk pace, Marciano Calamato and Mireya Noa walk along the dry, yellow soil of their farm, where they even manage to grow onions in Cuba's unique semi-arid eastern region.
The seed was planted more than 20 years ago by a group of indigenous women who began to gather to try to recover memories from their people. Today, women are also the main protagonists of La Voz Indígena (The Indigenous Voice), a unique radio station in northern Argentina that broadcasts every day in seven languages.
Dozens of trucks used to leave São Gonçalo every day, carrying the local agricultural production, mainly coconuts, to markets throughout Brazil, including the cities of Rio de Janeiro and São Paulo, more than 2,000 kilometers away.
"I've been used to hauling water since I was eight years old. Today, at 63, I still do it," says Antolín Soraire, a tall peasant farmer with a face ravaged by the sun who lives in Los Blancos, a town of a few dozen houses and wide dirt roads in the province of Salta, in northern Argentina.
Young Peruvians plan to take advantage of the knowledge acquired in Brazil's semi-arid Northeast to bring water to segments of the population who suffer from shortages, after sharing experiences in that ecoregion on the multiple uses of renewable energies in communities affected by climatic phenomena.
A long chain of people is winding its way along the highways of Chiapas, the southernmost Mexican state. It is moving fast, despite the fact that one-third of its ranks are made up of children, and it has managed to avoid the multiple obstacles that the governments of Honduras, Guatemala and now Mexico, under pressure from the United States, have thrown up in a vain effort to stop it.
They sell their houses, cars, motorcycles, household goods, clothes and ornaments - if they have any - even at derisory prices, save up a few dollars, take a bus and, in many cases, for the first time ever travel outside their country: they are the migrants who are fleeing Venezuela by the hundreds of thousands.
“The sun which used to torment us now blesses us," said one of the 19 women who run the Community Bakery of Varzea Comprida dos Oliveiras, a settlement in the rural area of Pombal, a municipality of the state of Paraiba, in Brazil's semi-arid Northeast.
Rocks, once a hindrance since they reduced arable land, have become an asset. Pedrina Pereira and João Leite used them to build four ponds to collect rainwater in a farming community in Brazil’s semi-arid Northeast.
"Now we live well," say both Givaldo and Nina dos Santos, after showing visiting farmers their 1.25-hectare farm in Brazil’s semi-arid Northeast, which is small but has a great variety of fruit trees, thanks to innovative water and production techniques.
At more than 3,300 m above sea level, in the department of Cuzco, women are beating infertile soil and frost to grow organic food and revive community work practices that date back to the days of the Inca empire in Peru such as the "ayni" and "minka".
Having a seven-litre container with a filter on the dining room table that purifies the collected rainwater, and opening a small valve to fill a cup and quench thirst, is almost revolutionry for Salvadoran peasant farmer Víctor de León.
Cattle ranching has been severely affected by drought in Brazi's Northeast region, but it has not only survived but has made a comeback in the Jacuípe river basin thanks to an optimal use of water.
In the airport of this Mexican city, on the border with the United States, customs agents warn that they will carry out a "random" inspection. But it's not so random. The only people who are stopped and checked have dark skin and kinky hair, and virtually do not speak a word of Spanish.