Avoid use of unprotected metallic lead when possible

Problem: Many electronics components are made with lead which when disposed of can poison local water tables.
Solution: Whenever possible buy RoHS compliant electronics and electrical equipment. RoHS compliant materials are free of Lead, Mercury, Cadmium, Hexavalent chromium, PBB, and PBDE. When using products with metallic lead make sure it is oxidation protected.
Cost: While not very common, non-lead alternatives have been recorded to have reliability issues regarding thin strands of metal that can grow and make contact with adjacent parts causing short circuits.
Benefit: Toxic heavy metals are less likely to leech into local water supplies from landfills if they have a oxidation protective layer. Currently the physics store room only offers RoHS compliant electronics.