Voice of America: The White House on June 16 released a report it described as the most comprehensive to date on the effects of climate change in the United States. It says farmers and ranchers will be among the most affected. But some farm producers don’t see it that way. The Earth’s present carbon dioxide concentration of about 385 ppm is about 30 percent above its highest level over at least the last 800,000 years. Click to view full graph and explanation Jerry Melillo is one of the lead …