Whether, in light of the fact that the dumping of used tyres appears to have increased across the Republic over the past few years with a significant negative impact on the environment, particularly in parts of Durban as well as in stormwater drains in Cape Town and elsewhere, her department has undertaken any research into the correlation between the tyre levy which was instituted in 2017 and dumping of tyres that could otherwise be reused; if not, (a) why not and (b) what systems are currently in place to address the recycling of used tyres; if so, what are the relevant details;