Yes, climate change is a naturally occurring cycle that happens at many periods on Earth. Humans aren't the ones who are causing climate change, rather we are accelerating the process at a rate that higher than natural. There have always been natural amounts of greenhouse gases that blanket the Earth's atmosphere (after all, without them we would all freeze), but with our pollution and dependency on fossil fuels, we are exposing the atmosphere to amounts that are unnatural. This is causing more of the sun's radiation to "bounce back" and stay in our atmosphere (among other things), thus it is accelerating the process of climate change.
Are we at a high risk level yet? No. But if we continue at the rate we're currently in, then we could influence climate change at a severe level. This could be detrimental to us, but more so to the plant and animal species who depend on the natural cycle to pollinate, migrate, mate, etc. This rate is also too fast for evolutionary changes to occur that could possibly help these species cope with climate change.







