In 2011 133 countries and regions signed up for the event this year, with 13 of them taking part for the first time.
There were about 135 countries that took part in Earth hour.
Earth Hour 2009 was carried out across 25 time zones, and involved 4000 cities in 88 countries.
The first Earth Hour took place in Sydney, Australia. The second Earth Hour took place in New York City, in the USA. There are as many as 38 countries participating today.
Earth Hour helps in many ways it saves energy also when you do Earth Hour you realize what you are actually doing to the earth.
Fourteen countries partipicated in world cup 2011.
There are over 1 million people who partisapat in earth hour per year
Countries in the World are 195 in 2023
193
14 countries participated in the 2011 Cricket World Cup
The Earth rotates 14.9590452 degrees per hour.
Possibly you mean 'How many countries on the Earth?' There are about 200 countries - my atlas lists 195, but 204 attended the recent Olympics.
There are 196 countries on Earth as of 2014. However, some countries do not recognize Taiwan as independent from China and consider there to be only 195 countries.