From the BBC website
President Barack Obama’s plans to regulate emissions of carbon dioxide from US power plants have been stalled by the US Supreme Court.
The court ruled that the president’s Clean Power Plan could not go forward until all legal challenges were heard.
Designed to cut US emissions by 32% by 2030, the scheme put huge emphasis on a shift to renewable energy.
It formed the key element of the US pledge at UN climate negotiations held in Paris in December last year.
Introduced by the president last August, the plan set carbon reduction goals for each state and it was up to the states themselves to come up with proposals to meet those goals.