While good, you should always keep in mind that using renewables for this means that power can’t be used for other purposes, meaning the difference has to be covered by other sources of energy. Always bear in mind that these things don’t exist in a vaccum. The resources they use always mean resources aren’t used elsewhere. At worst this would mean that new clean power is built to power a waste, and then old dirty power has to be used for everything else, instead of being replaced by clean energy.

1.5% to 3% is a doubling (100% increase). It’s not 1.5%, but 1.5 percentage points. It’s a very normal use of percentages