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For how long has the most famous coal-mine fire been burning?
The coal-mine fire in Centralia in the USA has been burning for 23 years
The coal-mine fire in Centralia in the USA has been burning for 97 years
The coal-mine fire in Centralia in the USA has been burning for 48 years
What core technologies are used in the Sahara Forest Project.
Salt-water greenhouse and solar energy
Water power and wind power
Solar energy and salt energy
How much energy is required to recycle an aluminium can in relation to manufacturing one from new aluminium?
12 percent of the energy
Just 5 percent of the energy
35 percent of the energy
Which is reckoned to be the larger source of emissions: the transport sector or the felling of rainforests?
Equally as large
The transport sector
The felling of rainforests
Which major international politician wants to introduce a ban on subsidising coal, oil and gas?
British Prime Minister Gordon Brown
The U.S. President Barack Obama
German Chancellor Angela Merkel
Where can salt power plants be built?
Anywhere where fresh water runs out into the sea
where there’s waterfalls
Where the salinity of the sea is over 25 percent
How much less electricity is used by an A++-marked fridge than a B-marked one?
50 percent less electricity
30 percent less electricity
10 percent less electricity
With which environmental issue is the Beatles singer Paul McCartney associated?
Shopping-free Monday
Car-free Monday
Meat-free Monday (eat less meat)
What is the name of the world’s first floating windmill?
Downwind
Statwind
Hywind
Which greenhouse gas is the most potent: CO2, Methane or Laughing gas?
Laughing gas
CO2
Methane