Republican presumptive nominee John McCain is focusing part of his presidential campaign this week on alternative energy and how to solve what he says is the world's climate crisis.

McCain toured a wind power company in Portland, Oregon on Monday.

He said wind energy is just one of the clean and affordable alternatives to fossil fuels.

McCain also called global warming undeniable.

"Whether we call it "climate change" or "global warming," in the end we're all left with the same set of facts. The facts of global warming demand our urgent attention, especially in Washington," he said.

McCain also wants China and India to join the U.S. in cutting down greenhouse gas emissions