| List I | Environmental Accidents | List II | Year |
|---|---|---|---|
| A. | Chernobyl nuclear disaster | I. | 1986 |
| B. | Bhopal Gas Tragedy | II. | 1984 |
| C. | Donora air pollution | III. | 1948 |
| D. | The great smog of London | IV. | 1952 |
Rearrange the following parts to form a meaningful and grammatically correct sentence:
P. a healthy diet and regular exercise
Q. are important habits
R. that help maintain good physical and mental health
S. especially in today's busy world