There's many reason why there's a climate change such as  human activities, volcanic eruption, balance between energy entering and leaving the planet’s system etc.. Though there's a lot of reason as a human who live in earth we must help our mother earth let's make a campaign to the countries who has a big percent why our air become polluted  because of the smoke from their factories, and the campaign to minimize cutting trees. Let's support also the reduce, reuse,recycle.