[SaratogaEnergy]

HSE is health and Safety. I'm not sure what the 'E' stands for :)

[doctorcroc]

https://en.wikipedia.org/wiki/Environment,_health_and_safety

[mdorazio]

E = Executive [1]

They're considering the possibility that CNTs pose specific health concerns (kind of like asbestos from what I understand), which would create quite a few regulatory changes in both production and usage.

http://www.hse.gov.uk/nanotechnology/

[skosch]

Environment :)