Which type of energy would most likely create the worst environmental disaster from an accident or spill?

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block

The most common form of matter in the universe

Polar bears give birth and hunt on sea ice. which of the following would polar bears survive during the melting of arctic ice? growing another layer of fur during summer migrate inland to search for different food sources staying put until the ice refreezes sticking to the usual diet of seals