That is a good question @bergat . Regardless of what we do, we use energy in its various forms and cause emissions. So what I want to know is what we/I can do to reduce greenhouse gases.
It is true that, as individuals, we do not affect the environment so much. But if 50 million photographers choose to go on foot instead of taking the car, then it has a big impact on the environment.
How can we/I reduce the negative trend on our enviroments as a photographer? Can we take as nice pictures as before while consuming less?