| With obesity rates trebling in England during the last 20 years the estimated human and economic costs are staggering. |
| The vortex hypothesis suggested an explanation of the widening of many spot lines, and the doubling or trebling of some of them. |
| We'll find that hard enough to explain to Baron Tellian without doubling or trebling the butcher's bill. |
| Recycling is at its highest ever level, with some authorities in Yorkshire doubling and even trebling their rates in a year. |
| Attention is also being focused on the possibility of trebling or even quadrupling the length of suburban rail track. |
| Their greatest innovations came as a live band in the San Francisco club, extending their solos and trebling their volume to fit the expanded consciousness of their audiences. |
