drastic

1 - As schizophrenia is now so prevalent, many psychiatrists are disposed to resort to quick, drastic methods of treatment.

2 - When he became President, he made drastic changes in the country's foreign policy.

3 - Fossil analysis reveals that at least five periods in the last 600 million years have seen a drastic reduction in the number of species of flora and fauna on the Earth.

4 - Many countries share the view that drastic measures must be taken to stop the pollution of the seas.

5 - As the world gets hotter by degrees, millions of poor people will suffer from hunger, thirst, floods and disease unless drastic action is taken.