Until irresponsible corporate interests in key industries around the world* decide to make changes for better and sacrifice their profits, it doesn't really matter what the average person does. They're the biggest contributors and won't look beyond their own disgusting avarice.
Of course there are things we can do each and every day to reduce our impact on the environment, but it's a relative drop in the bucket individually compared to those hundred or so entities that just want to maintain the status quo of generating wealth for a select few on this planet.
* Canada included (we're amongst the worst per capita)