The city of Rio de Janeiro, Brazil, like many others, has not managed to escape two of the world's most complex environmental problems: food waste and building an energy system that does not increase global warming. Seeking to change both scenarios, in 2018 the city of Rio's rubbish department, known as Comlurb, inaugurated the first plant to convert organic waste into energy.

Recently, the Vatican launched an online platform for Catholics to learn how they can act on this global crisis. Called Laudato Si' Action Platform, it contains information for the Catholic congregation, organisations and individuals themselves to learn how to reduce their emissions. It helps them, for example, to assess their environmental impact and, at the same time, create a plan with actions to reduce their carbon footprint, such as planting trees, reducing energy use and, in the case of large church organisations, avoiding investing in fossil fuels.

Climate change, it has become clear, is a current phenomenon. However, how it will affect each community or individual depends on a number of factors. That is why the non-profit research group Headwaters Economics created a free online tool, called Neighbourhoods at Risk, to allow people in the United States to see how climate change will affect their neighbourhood.

In 2015 Pope Francis published one of the most iconic encyclicals of all time: Laudato Si: On Care for Our Shared Home. The letter, which is usually a document that Popes address to both bishops and the Catholic faithful, this time was also a reflection on the climate crisis we live in, ethics and science.

Daniela Fernandez, founder of the Sustainable Ocean Alliance (SOA), remembers well the moment she decided to do something for the environment.

"Marce used to sell fish, now she saves them. These are the words with which the organisation Azul, the only one in the country focused on educating Latinos about marine conservation, describes its founder and director, Marcela Gutiérrez Graudins.

Irma Muñoz, now 68 and director of the organisation Mujeres de la Tierra, remembers vividly when her mother used to collect water in pots of broth and tamales every time it rained. Once, scared, Irma asked her mother, "Are we so poor that we can't afford water?"

Geovani Caldero began his professional career as a biology teacher in Puerto Rico, where he realised the need for more education on climate change.

When you hear about Arizona, the most likely thing that comes to mind is an arid landscape with little rainfall. This reputation as one of the states with the least rainfall is not in vain.

Mangroves, an ecosystem that lies right where freshwater and seawater meet, is one of the most key biomes for combating climate change worldwide.

In 2016, a group of researchers at Oxford University found that if everyone went vegetarian, carbon emissions would be reduced by up to 70% by 2050.

This is the Mainstreet Project, an initiative that combines research and innovative practices to generate regenerative agriculture and environmentally friendly farming models.

The world is full of sacred places that we have forgotten. Places where not only the energies of beings come together, such as rivers and mountains, but where thousands of animals and plants still live: biodiversity hotspots.

The mission of the Latino Outdoors organisation is very clear: to unite all those things that make us a community.

For Amy Dominguez, a Latina woman and part of her family's first generation of U.S. citizens, protecting the environment is one of the ways she connects with her ancestors.

"All religions have a creation story. Some story that calls on people to take care of nature because, ultimately, we humans are also part of nature".

The South Florida area is one of the most vulnerable to climate change.

"We embark on projects that take time, that seek to bring people together, to talk to neighbours and residents so that they realise what is going on in the community.

Although food waste is much talked about, little mention is made of its relationship to climate change.