Climate change is not a question of normal variables. If you're saying that, you're like someone saying "Ah, sure families always quarrel" while your neighbour takes a shotgun to his wife and kids.
The graph on this US government website will give you an idea of the real scale of a disaster which is virtually certain to make humans extinct within the next 50 years.
For myself, I do what I can: I use shopping bags, not plastic bags, I cycle everywhere - 40% of car trips in Ireland are under 4km (a figure that's similar in most places), and if all those trips were made on a bike instead of in a car it would have a big effect on carbon emissions. I eat less meat than I did - meat production is wasteful. It's probably like throwing a thimbleful of water into an inferno, but enough thimblefuls and we might, might, maybe have a chance.