http://en.wikipedia.org/wiki/ITER
"Currently there are seven national and supranational parties participating in the ITER program: the European Union (EU), India, Japan, People's Republic of China, Russia, South Korea, and the USA."
"The largest current experiment is the Joint European Torus [JET]. In 1997, JET produced a peak of 16.1 MW of fusion power (65% of input power), with fusion power of over 10 MW sustained for over 0.5 sec."
"The program is anticipated to last for 30 years — 10 for construction, and 20 of operation — and cost approximately €10 billion (US$14.6 billion), which would make it one of the most expensive modern technoscientific megaprojects. It will be based in Cadarache, France. It is technically ready to start construction and the first plasma operation is expected in 2016."
"Although ITER is expected to produce net power in the form of heat, the generated heat will not be used to generate any electricity."
"There would be no acute danger ... The 12 year half-life of tritium would at least prevent unlimited build-up and long-term contamination without appropriate containment techniques ... most of the radioactive material in a fusion reactor would be the reactor core itself, which would be dangerous for about 50 years, and low-level waste another 100."
"Assuming a fusion energy output equal to the current global output and that this does not increase in the future, then the known current lithium reserves would last 3000 years, lithium from sea water would last 60 million years, and a more complicated fusion process using only deuterium from sea water would have fuel for 150 billion years."
"Solar, wind, and hydroelectric power all have a relatively low power output per square kilometer compared to ITER's successor DEMO which, at 5000 MW, should have an energy density that exceeds even large fission power plants.[31] If fusion ever becomes commercially viable, greenhouse gas emissions from electric power generation could be almost completely eliminated, with minimal environmental impact and without long-term nuclear waste issues."
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All of these have sources listed, within the article.