Whether we live on the edge of the forest or in the heart of the city, our livelihoods and indeed our lives depend on the services provided by the Earth's natural systems.
Our global footprint now exceeds the world's capacity to regenerate by about 30%. If our demands on the planet continue at the current rate, by the mid 2030s we will need the equivalent of 2 planet Earth to maintain our lifestyles.

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Researchers unveil a more efficient way to wash the air clean of carbon dioxide

Their system is a kind of air scrubbing tower, which takes air and reacts the CO2 out of it by exposing it, in this case, to sodium hydroxide. Then the stuff goes through a few chemical intermediaries eventually leaving separated CO2 that can be piped away, and more hydroxide to feed back into the scrubber.

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Community based tourism refers to situations in which local people—usually those that are poor or economically marginalized in very rural parts of the world—open up their homes and communities to visitors seeking sustainably achieved cultural, educational or recreational travel experiences.

Community-based tourism generates lucrative revenues for poor or native communities in developing countries while enabling travelers usually accustomed to chain hotels and beachfront resorts to learn about traditional cultures.

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Decades of chemical pollution have damaged the ozone layer of the upper atmosphere that shields Earth from the harmful effects of the sun's ultraviolet rays, each summer eating a hole over the South Pole that expands to nearly the size of Antarctica.

But since 1996, when an international treaty banned the culprit chemical refrigerants and propellants (known as CFCs, or chlorofluorocarbons), the size of the seasonal tear has been shrinking—and scientists predict it may stop forming by the end of this century.