Comment by saagarjha

That's definitely not true. Let's take Americans, for example, driving their cars to work. Americans are about 15% of the world's emissions, of which 25% or so is transportation, of which well over half is cars. So you not driving to work is making direct impact on 2-3% of the world's overall emissions. Likewise, your decisions on all the other things, if taken in aggregate, will have a significant impact on overall emissions.