Residual waste cannot be eliminated
Your correspondents' many commentaries on waste incineration are certainly well intended, but often miss the point and some statements claimed as fact remain unsubstantiated.
Firstly, the residue of the incineration process is not toxic sludge, as stated in one letter, but ashes, which can be used, for example, in building construction.
Second, the moving grate technology, unlike the plasma arc method, is proven and tested for large-scale incineration plants, like the one proposed to be constructed in Hong Kong.
Thirdly, recycling is often presented as the alternative to incineration.
This would be true only if a 100 per cent waste recovery rate was practically achievable.
Fourth, many readers pick on the administration as the main culprit for not having solved the problem long ago.