Houston Chronicle: WASHINGTON — Congressional Democrats on Monday kicked off what promised to be a heated weeklong debate over far-reaching climate change legislation that would put new limits on greenhouse gas emissions blamed for the Earth`s rising temperature. Rep. Henry Waxman, D-Calif., hopes to steer the measure through his 59-member Energy and Commerce Committee before Memorial Day, sending it to the full House for a floor vote later this year. To boost his odds, Waxman has made …