GHG
Greenhouse Gas. Emissions (mostly CO2) from the burning of fossil fuels.
Gigafactory
A large factory which produces electric cars or batteries. Usually refers to Tesla facilities. Because Elon Musk likes to invent his own name for everything.
Granny charger
An electric vehicle charging cable with a three-pin socket which can be used in emergencies to add range. Only charges at around 2kW so it’s very slow. So called as it’s the sort of cable you’d only use if you went to visit an elderly relative.