Geoengineering: A Technology Fraught With Consequences We Can't Anticipate, Or Saviour Of Humanity?

I was watching The National last night, which presented what I felt was a too-cheery piece on geoengineering, the process whereby climate is purposely altered through human intervention. The report looked at the aspect of climate intervention known as Solar Radiation Management, a process that involves putting materials into the air (often the stratosphere) to reflect sunlight and thus reduce global warming. The problem with the entire concept is that it has the potential to adversely affect billions of people.

One point that sticks in my mind from the report, however, is that the scientist interviewed stated, in answer to the objection that artificially altering our climate would be undesirable, that we are already doing so by the billions of tonnes of greenhouse gas emissions that have already accumulated in the atmosphere since industrialization began.

Take a look and see what you think. Is geoengineering inevitable? Will it become a necessity? I would be especially interested in reading the thoughts of The Mound of Sound, whose recent post explored the fact that carbon being released from our soil is about to become a huge problem in our attempts to confront climate change.