climatarian
An individual that monitors and conforms to all climate change recommendations in an attempt to preserve the environment. Typically connotes an individual more dedicated than could be considered reasonable.
<Average Joe> : Average George must be really concerned about the planet. When it was global cooling he had the heater going 24/7, and now he's watering his plants with ice-cubes.
<Average Bill> : Yeah, he's a real climatarian.
<Average Bill> : Yeah, he's a real climatarian.