Why Does Evil Exist?

It amazes me when I look at God's majesties of the world, like the mountains, the sky, clouds and rainbows that almost everywhere you look there is a human doing so much evil, and living around these ordinary miracles that God has given to us. Ya know I think that most humans overlook nature and God. Most people are so focused on the superficial things. Now grant it , we all cannot look at the sky or mountains all day, (although I would quite enjoy that), we all have our own responsibilities. But if we took just a small five minute break and actually see the beauty of grass growing or how slow tor fast the clouds are moving or at least watch (not glance) at the sunset each day...I wonder what the world would be like. Maybe there would be more environmentalists running around, but what ever it would come out of it......I know that it would definitely be beneficial to us as humans and to our planet. But the question still lingers........why are there still evil people in the world? Is it because we all sin at one point or another? Is evil just apart of our human nature? Well what ever the answer may be, I know one things is for sure.........is that if we just pay more attention to God's creation, maybe our world would become closer to god in our hearts, because God  is already close to us and to prove it.....just look at how the the wind slightly blows through the trees and you will see.