Science & Environment

Rio+20: What's changed since the Earth Summit?

World leaders are in Brazil for the Rio+20 summit on the environment, which comes 20 years after the landmark Earth Summit in the same city. But how has the planet changed since 1992? Find out with our click-through slideshow.

CO2 emissions increased by 36% between 1992 and 2008. CO2 concentration in the atmosphere increased by 9% between 1992 and 2010.
66% increase in energy and heat generation. Air travel doubled. Mobile phone users rose to 5.4 billion. Internet users reached 2 billion.
The average temperature of the Earth increased by 0.4C.
The Earth's population have increased by 1.5 billion, but the population growth rate has fallen.
Primary forest area has decreased by 300 million hectares. Access to drinking water has increased by 13%, as has access to sanitation.