we showed dollars engelhard our footage from the rubber plantations. in the us is that shocking it's definitely shocking i can't find any excuse or explanation for that we now definitely have to look to the future. like continental the other market leaders bridgestone and michelin also don't want to give us an interview we try our luck and how near frankfurt where the world's 3rd biggest tire manufacturers based goodyear but we have no success here good years simply responds with a written statement good year doesn't buy natural rubber from cambodia resource less than 5 percent of our global requirements for natural rubber from thailand. it goes on we are committed. to the responsible sourcing of raw materials including natural rubber. and the statement continues. we offer a retread tires for commercial vehicles and aircraft reducing the use of natural rubber. but why does goodyear retread the tires of commercial vehicles and planes and not the tires of private cars which make up the vast majority of the vehicles we visit germany's only big retread are