Boston Globe: TWO FACTS are driving the Obama administration`s “cash for caulkers“ proposal to offer homeowners rebates for energy-saving projects. The first is that 17 percent of the nation`s construction workers are still unemployed and could use the work. The second is that homes are responsible for 21 percent of the nation`s carbon dioxide emissions, twice as much as passenger cars. President Obama should send a bill to Congress as quickly as possible to get the program up and running. In one …