Figure 1 shows a fuel tanker delivering petrol to an underground storage tank at a petrol station.

Explain why delivering petrol in this way can be highly dangerous and how connecting a copper earthing wire between the tanker and the storage system prevents these hazards.
Practise Edexcel GCSE Physics Charging by friction and electrostatic phenomena with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Physics (1PH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.