McClatchy Newspapers: A growing number of lawmakers who are deeply involved in the effort to reduce greenhouse gases and global warming are beginning to question “cap-and-trade,” the current hot-button solution to the problem. The chair of the Senate Energy and Natural Resources Committee’s energy subcommittee, Sen. Maria Cantwell , D- Wash. , says she isn’t so sure the “cap-and-trade” approach favored by the White House , environmental groups and many of her Democratic colleagues is the way to reduce …