Optimal fingerprinting had been used before to put climate trends down to both natural and manmade causes.

ECONOMIST: Climate change (I)

In collaboration with the leadership provided through the National Disaster Recovery Framework (NDRF), the Task Force will identify opportunities for achieving rebuilding success, consistent with the NDRF's commitment to support economic vitality, enhance public health and safety, protect and enhance natural and manmade infrastructure, and ensure appropriate accountability.

WHITEHOUSE: The White House

But this is an emerging and highly complex area of science because of the interplay of natural factors and manmade greenhouse gases at a time when a key set of temperatures - in the deep ocean - is still relatively unknown.

BBC: Climate model forecast is revised

So are there at least -- if there aren't manmade landmarks, are there some natural landmarks other than continents that you can see?

WHITEHOUSE: President Obama's call to the International Space Station

Then, so the story goes, the manmade global warming of the industrial era outstripped all natural variations and released the body as a warning to us all.

BBC: [an error occurred while processing this directive]

This optimization is not only for natural resources or systems, but also for manmade ones as well.

FORBES: How The Internet Of Things Will Change Almost Everything