What is the expected rise in sea level by the year 2050 and discuss at least three major ways this will affect islands or coastal areas. So much has been put out in the media about global warming and the "greenhouse effect". Now the Earth has had wide variations in atmospheric CO2-level throughout its long history before the evolution of humans and certainly before the Industrial Revolution. In terms of the oceans and the Earth's whole history then could you find information to support the coal and oil industry's claims that we're NOT the cause of climate change?