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Green cities are resilient, self-sufficient and sustainable urban spaces that seek to improve the population's quality of lifeKonevi image by PixabayDo you know what green cities are? Probably yes, but what does this concept mean? Green cities are sustainable cities, designed with respect for the environment, economically viable and socially fair operations.

Exhibitions take place simultaneously this month of AugustThe fair complex that brings together ExpoSucata, MercoApara, ReciclaPlast, Expolixo and RCD Expo, has just won another fair, MercoHydro. This proves not only the exponential growth of the reuse and reuse of waste and scrap markets, but also the commitment of the now six events brought together by Editora EcoBrasil.

Components extracted from urine become fertilizers, while faeces turn into biogas and can be converted to energyScientists at the Nanyang University of Technology (NTU) in Singapore have developed a toilet that turns human waste into energy and fertilizer. It's not one of the most glamorous technologies, but without counting the advantages already presented, the system allows you to use 90% less water when pressing the flush.

Natural reuseThe leaves, like any other organic matter, can be reused by nature instead of being stuck in plastic bags in a landfill for many years.CompostInstead of putting them in a plastic bag that will be taken to a landfill, try using compost. If you have a specific machine, the result is better.

A study defends the need for judicious burning for the preservation of the richest savanna in the world, a prodigy of biodiversity and cradle of important Brazilian riversAlmost always presented as an enemy of ecosystems, fire is, however, indispensable for the preservation of savannas, as unanimously affirmed by scholars on the subject.

Through the study of urine it is possible to know how the body metabolizes substances contained in food and medicinesEverything in the world is composed of elements and chemical combinations, including the human being. It's no exaggeration to say that knowing some of the mysteries of chemistry allows us to see the universe differently.

Advertising campaign in the city of Toronto, Canada, uses the garbage itself to make people aware not to litter the streetsIn any city in the world, it is easy to find garbage strewn around the streets. There are plastic bags, cans, bottles, newspapers and so on. That garbage gets dirty is obvious, but it also contributes to several other problems, such as visual pollution and clogging of manholes.

Carbon cycles are the displacement movements of the element carbon in different environmentsEdited and resized image by Mitchell Griest, is available on UnsplashCarbon cycles are the displacement movements of the element carbon in different environments, including rocks, soils, oceans and plants. This prevents it from completely building up in the atmosphere and stabilizes the Earth's temperature.

A study showed insecticides and fungicides reduce the lifespan of bees by up to 50% and alter the behavior of workers, which could compromise the hiveImage: Massimiliano Latella on UnsplashA new study by Brazilian biologists suggests that the effect of pesticides on bees may be greater than imagined.

Studies show that in the Paleolithic period there was already reuse of toolsAccording to studies carried out in Catalonia, a region located in Spain, recycling is not a current activity, quite the opposite. Evidence shows that in the Paleolithic period of history, men already recycled their stone artifacts.

Want to make stylish shelves and bookcases for very little money? Wooden crate is an alternativeImage: Pixabay/ CC0 Public DomainNeed a piece of furniture for your living room, but don't even have a penny? Reusing wooden crates, very common in street markets to carry fruits and vegetables, can be a beautiful and efficient way to decorate your home.

Encourage conscious consumption of electricity in your condominium, in addition to preserving the environment, residents will save on billsImage: EcobrasiliaTo achieve a rational use of electricity in everyday life, as with water, it is necessary to encourage energy savings in condominiums. The high consumption of electricity is an indicator of the non-rational use of the tenants and results in high expenses in the bills at the end of the month.

When we buy a new cell phone, the old charger loses its usefulness. And the way is to look for a place to collect it, to dispose of it in an ecological way A survey commissioned by a mobile communications company in 2008 showed that only three out of every 100 cell phones manufactured in the world are sent for recycling.

UV sterilizer device can be a good option to prevent germs on objects such as phone, keys and walletImage: PhoneSoap/DisclosureReturning to regular post-pandemic activities is likely to be more challenging and require more than just wearing masks. There is already research underway for clothing made with copper or with antiviral properties, but these features still seem far from affordable.

inhale is a special coloring book, made for those who enjoy this hobby, but also want to share their art with other people.inhale , published by Editora Voo, features illustrations by artist Felipe Tosin and was printed with a spiral finish, which facilitates handling and highlighting of the pages. In each of the images is an inspirational phrase selected from the thoughts of great leaders and artists.

Understand how and why we feel envy, the famous elbow painOne of the ways found by ancient peoples to understand nature and human behavior led them to mythology. In Greco-Roman mythology, for example, there is a series of teachings and myths that sought to explain natural and behavioral phenomena. The protagonists of these myths were gods and goddesses, immortal creatures, endowed with special powers, but with essentially human characteristics.

With themes focused on citizens and business, fully open courses do not require prerequisitesEdited and resized image by Lukas Blazek is available on UnsplashThe Getúlio Vargas Foundation (FGV) made available two totally free online courses in the area of ​​sustainability. The themes are: "Sustainability in everyday life: guidelines for citizens" and "Sustainability applied to business: guidelines for managers".Cour

Meet PLOF, a bank made from the reuse of industrial fabric wasteEvery day the textile industries generate tons of waste. They are fabrics of all kinds, discarded due to excess production, small manufacturing defects or errors caused by unskilled labor. These leftovers are usually thrown in the trash, or burned, losing any and all use they could still have and thus contributing to the pollution of cities (whether air pollution with burning, or pollution of rivers and bodies of water or land , with incorrect disposal).

The idea is to show how recyclable materials can be useful for different usesDisposable materials are being used a lot by people who use their imagination and create new objects from old ones. Some even more innovative initiatives are incorporating the materials into large structures such as buildings and houses.