Some may argue the reduction of greenhouse gases is not necessary simply because they believe climate change is not a serious threat. They argue, "The climate has always been changing, pictures of retreating mountain glaciers are not proof of global warming. They have increased in size and retreated many times before man." Their beliefs are climate change can’t be proven because the proof isn't valid enough to support, and that the reduction isn’t needed because the cost would result in a huge drop in the economy and standard of living. This is not true because climate change has already been proven and is a real life threat to our planet. Changes in climate are closely monitored over the years. The proof is rapid ice melting, droughts and