Darwin Loves...

...carbon monoxide:

David Grant, a car parts worker, drove 200 miles to Dartmoor to kill himself - after printing off Google aerial pictures of his suicide location from the internet.

The 40 year-old from London planned his death with great precision and left A4 size sheets on his car telling passing people not to open the doors.

[His] signs read: "Danger. Do not enter at any cost. CO2 kills."

Well, in high enough concentration, yes... but the car was full of carbon MONoxide (CO), a by-product of carbon combustion. He appears to have known precisely as much about chemistry as the average global warming activist. Better yet, maybe he was one, in which case good riddance and thank you for improving the gene pool.