Look at it a little closer:

Notice how the curve levels off as the earth reaches an equilibrium?
Whatever reasons caused the increase are cancelling out.

Look at the Little Ice Age.
Do you think that man could be having an effect on turning it around?

Things ARE warming up but if you think this is all a natural cause and effect and that man does not have an effect, you are just burying your head in the sand.

How can you think this? Do you not have eyes?
Do you not have a brain?

Have you never seen notice of beaches being closed due to pollution?
Have you ever flown over a city on the water and seen how far it's polluted influence extends out into the water? Have you not noticed how it is hard to get some previously abundant fish dinners because of over fishing?

Have you ever walked a once pristine beach now littered with cruise ship effluent?

The earth is a closed system being fed by solar power.
Change the transmission of the sun's power and you effect the stability of the environment.

Reduce the balance between elements by deforestation, pollution, or over use and this is transmitted to the whole.
Look at the hole in the Ozone, primarily caused by human-produced compounds that release chlorine and bromine gases in the stratosphere.
It is said that this is helping Antarctica resist global warming.

I have watched as man's pollution has reached greater and greater proportions.
I don't need some evangelist with his own agenda to tell me we are having a negative effect on our environment.
I don't need any self proclaimed experts telling me that it is all natural and "don't worry - be happy".

As a child I could lie in my Park Ex backyard in Montreal and watch the stars.
As a teenager in the same yard most of the stars were gone due to the increase in light pollution.
As an adult I could not even find the yard, the neighborhood converted from single family homes and duplexes to unending apartment buildings. There are few yards left. Hundreds of thousands of trees gone and numerous square miles of lawn are now home to 35,000 people living in only 1.6 square kilometers.

IMO they should tax the crap out of polluters.
Force them out of business if they won't meet "green" standards.
Set tough green standards.