How can you tell what clicks are invalid

Is there anyway you can tell?

 

If you get low impressions and high clicks then there invalid

 

The list of parameters that google receive before showing ads on your site:

client = ca-pub-xxxxxxxxx
dt = 1198222956977
lmt = 1198222956
format = 336x280_as
output = html
correlator = 1198222956974
channel = 11123123123
url = http://www.example.com <--- on what page ADS show
color_bg = FFFFFF
color_text = 000000
color_link = 000000
color_url = 000000
color_border = FFFFFF
ad_type = text
ref = http://www.refsite.com/somapage.html <--- referer url
cc = 100
ga_vid = 920217492.1198222957
ga_sid = 1198222957
ga_hid = 475174155
flash = 9 <-- Installed Version of Flash
u_h = 900 <--- Your Display Resoulution Height
u_w = 1440 <--- Your Display Resoulution Width
u_ah = 870 <--- Your Display Working Height
u_aw = 1440 <--- Your Display Working Width
u_cd = 32 <--- Your Display Color Depth
u_tz = 360
u_his = 2
u_java = true <--- Java enabled or not
u_nplug = 12
u_nmime = 44

+ they track IP's

so you can see there are a lot parameters to detect real click ws invalid

 

That's interesting, I didn't know there were so many parameters involved.