The three-day visit begins with talks between a handful of US governors and six of their Chinese counterparts over issues that include improving energy efficiency in buildings, modernising electrical grids and commercialising renewable energy, and the governors are expected to meet privately with Xi later in the day.
"These are the largest economies in the world, and we're the biggest emitters of greenhouse gases, so improving cooperation and collaboration is really a necessity," said Brian Young, Washington state's director of economic development for the clean technology sector. "Second, it's a huge business opportunity. Both sides recognize the opportunity for job creation."
In November 2009, Obama and then-President Hu Jintao formalised a renewable energy partnership, including the establishment of clean-energy research centres focused on electric vehicles, cleaner coal and water energy programmes.
Last November, Obama and Xi announced that the countries would work together on climate change, with China announcing it would try to cap its greenhouse gas emissions by 2030, or sooner if possible.
By contrast, hacking attacks on the US, said to be directed by Beijing, and China's moves to assert its territorial claims in the South China Sea have been sore spots.
That shift will demand vast amounts of energy as China's middle class expands, noted Tom Ranken, president of the CleanTech Alliance, a Seattle-based trade association of companies and organizations with a stake in clean energy technology, including Boeing, the University of Washington and hundreds of others.
"For an American going to those cities it's quite stunning," he said. "They're ultramodern, and yet everybody has a story, including me, about going out Monday morning running and almost getting sick after about a half mile from the air pollution.
