For wind power, the IEA predicted a global capacity of 55 GW for wind power
in 2002, this was achieved only three years later. They then ramped estimates up to 97 GW in 2004, and again this number was achieved a few years later, in 2009. Today, Denmark is building an offshore wind plant that will generate a massive 10GW
, a fifth of the IEA’s originally predicted global capacity.