3rd Conditional
If scientists at Cernobyl Power Plant in 1986________(be) more careful, the nuclear reactor ___________(not/explode).
had been/ wouldn't have exploded
Diverse marine speciaes ____________(not/die) if the BP Oil Spill _____________(not happened)
Diverse marine speciaes WOULDN'T HAVE DIED if the BP Oil Spill HADN'T HAPPENED
If a massive tsunami _____________(not hit) Japan in 2011, the Fukushima nuclear disaster ____________(be) avoided.
If a massive tsunami HADN'T HIT Japan in 2011, the Fukushima nuclear disaster WOULD HAVE BEEN avoided.