One way to think about the cause of climate change is smog in the atmosphere. Things that cause the smog in the atmosphere are automobile exhaust fumes, smoke stacks from coal burning electric companies, heat from our buildings etc.
Luckily, we cannot see the smog yet. Maybe if the human race does not knuckle down and do something about emitting so much CO2 we will be able to see the smog on the atmosphere. I hope not.
So, buy fuel efficient cars (hopefully electric cars or hybrids), turn the heat down in the winter to 68 degrees and turn your air conditioner to 78 degrees in the summer, and recycle more.