Bloomberg: President Barack Obama’s push for a climate-change law this year has set off a lobbying boom on Capitol Hill, where companies are registering to weigh in at a rate of about one every business day. Representative Henry Waxman, the California Democrat crafting legislation in the House, and other lawmakers said they haven’t seen this much intensity since 1993, when the pharmaceutical companies and insurers lined up to combat President Bill Clinton’s proposal, championed by his wife, …