calculation

Hi, Can anybody direct me to a calculation that will show that the emission scale of greenhouse gases produced by man is enough to cause the effects being claimed to be caused by this emission? I've been trying to find such info with no avail so far. I think this is a very basic Requirement for...

Folks Can anyone point me to a site which explains how Bishop Usher calculated the year and date of creation, please? I thought I read somewhere that it was based on a 6000 year period, divided into three x 2000 year groups: Creation to Abraham, Abraham to the birth of Jesus, and the birth of...