I was listening to a podcast today about the movie Evan Almighty and how many things went wrong with the movie. One part that went right was that the movie was the first to be completely carbon neutral, which I thought was really cool. Here is how they did it.
• Carbon footprint calculation: The production team first measured the estimated carbon emissions the film would generate (including transportation, energy use, construction, etc.).
Tree Planting Initiatives: Director Tom Shadyac required crew members to plant 2,050 trees at the Rappahannock River Valley National Wildlife Refuge in Virginia and the San Joaquin River National Wildlife Refuge in California. 
• Recycling and Sustainable Practices: The production emphasized recycling, provided bicycles for crew members to reduce vehicle use, and used double-sided scripts to minimize paper waste. 
• Set Material Donations: the ark in the movie was a real fully built ark! When production was over the are was deconstructed and materials from the ark set were donated to Habitat for Humanity instead of being discarded.
• Use of hybrid vehicles: The production used hybrid cars for transportation during filming to reduce fuel consumption and emissions.
• Eco-friendly power: Efforts were made to reduce on-set energy use, including turning off equipment when not in use and optimizing energy efficiency.
• Recycling and waste reduction: On set, recycling programs and waste reduction initiatives were implemented, including composting and limiting single-use plastics.
All in all, I feel like these practices could be adopted more often. Thought it was a really cool story and wanted to share!