How much do carbon emissions need to be cut by if we're going to save the planet?
Climate scientists say the world must stop the growth of greenhouse gas emissions and start making them fall from 2015 to 2020.
By 2050 the experts say the world must cut how much greenhouse gas that is pumped into the atmosphere by 80% compared with 1990 levels. If they don't the world's temperatures will go up by 2C.
This might not sound much but it will make huge differences to life on earth.
Countries are going to have to make SERIOUS changes in how they make and use energy
Countdown to Copenhagen
www.guardian.co.uk/
Greenhouse gases
www.epa.gov/climatechane
The 10:10 campaign on learnnewsdesk
www.learnnewsdesk.co.uk
20 technologies to save the planet
www.guardian.co.uk
Official Copenhagen climate change summit website
en.cop15.dk/
Ideas on how to be a green school from the Pod
www.jointhepod.org/
Climate change site
www.epa.gov/climatechange