The sentences given below, when properly sequenced, would yield a coherent paragraph. Decide on the proper sequencing of the order of the sentences and key in the sequence of the numbers as your answer.
1
Veena Sahajwalla, a materials scientist at the University of New South Wales, believes there is a new way of solving this problem.
2
Her vision is for automated drones and robots to pick out components, put them into a small furnace and smelt them at specific temperatures to extract the metals one by one before they are sent off to manufacturers for reuse.
3
E-waste contains huge quantities of valuable metals, ceramics and plastics that could be salvaged and recycled, although currently not enough of it is.
4
She plans to build microfactories that can tease apart the tangle of materials in mobile phones, computers and other e-waste.
TITA Answer:
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