I think national issues play into gubernatorial races less than, obviously, in Senate and Congressional races. Much less. They tend to be more decided by personality, leadership qualities and by state or local issues. They still have some effect, no question about it, but not as much as Senate and Congressional races.

If I were president, I am not sure that I would offer Ed Rendell the job of chief of staff.

Creating new jobs for Pennsylvanians continues to be my highest priority throughout the Commonwealth.

And the beautiful open spaces, the forests of Pennsylvania, the recreational uses that come from having these green open spaces and forests, they contribute dramatically to the level of our tourism, dramatically.

Everything we think about regarding sustainability - from energy to agriculture to manufacturing to population - has a water footprint. Almost all of the water on Earth is salt water, and the remaining freshwater supplies are split between agricultural use and human use - as well as maintaining the existing natural environment.

As soon as it was clear, in Copenhagen in 2009, that the Senate was blocking Obama from introducing meaningful climate legislation, the push was for him to use executive authority, use the EPA, use the tool of federal leases, and there was just a refusal to do it.

Never denied climate change. It has always changed and always will.

The Millennials, a generation born digital, will have a much stronger impact on social behaviour than we currently assume. Global climate change and resource security will influence our lives in substantial ways.