NAIROBI, Nov 6 (Reuters) - China's richest baker has turned climate change crusader. Inspired to fight global warming after a visit to Lake Turkana in northern Kenya, Hong Luo has pledged a battlefund of $1.25 million over five years to the United Nations to help save what is known as the cradle of the human race. "It is the place human beings first walked the Earth. When I saw it my heart shook with its beauty," Luo told Reuters on the sidelines of a major climate change summit in Kenya. "I plan to come back again and again over the years to take its image. It will be my personal barometer to measure whether action on climate change is working," said the 39-year-old, a keen photographer who owns China's biggest bakery chain. Shallow Lake Turkana is located in hot, arid northeastern Kenya and is especially susceptible to evaporation worsened by global warming. Scientists have discovered many of the world's most significant early human fossils on its shores.