What is the order of preference of the various elements in integrated waste management hierarchy $\text{(highest preference to lowest preference)}$?
- Reduce $>$ Rcuse $>$ recycle $>$ Encrgy recovery $>$ Landfilling.
- Reuse $>$ recycle $>$ Reduce $>$ Energy recovery $>$ Landfilling.
- Reduce $>$ Energy recovery $>$ Reuse $>$ recycle $>$ Landfilling
- Reduce $>$ Reuse $>$ recycle $>$ Landfilling $>$ Energy recovery