If you think all kitty litter is interchangeable, you might want to think again. Some cats refuse to use foreign kitty litter while other cats don’t mind. Yet all kitty litter is not the same as the Department of Energy discovered recently.

Jim Conca, a scientist who worked at the United State’s only nuclear permanent nuclear waste dump from 2000 to 2010, believes that a change from non-organic to organic kitty litter caused a chemical reaction inside a waste drum, releasing the radioactive isotopes and creating a dangerous radiation leak. If the wrong type of kitty litter can’t contain nuclear waste, you know that the wrong type of kitty litter won’t be able to contain your cat’s litter box smells either.

To read more about how kitty litter may have caused a nuclear radiation leak, click here.