Sainsbury, Kraft Foods, Nestlé, Tate & Lyle and Unilever have also declined to sign up to a joint pledge on calorie reduction.
Last month, Mayor Michael R. Bloomberg and David Rockefeller planted a redbud (Cercis canadensis) at the Thomas Jefferson Houses in East Harlem as they announced their joint pledge of $10 million to the tree campaign.
David Cameron, Nick Clegg and Ed Miliband have signed a joint pledge to tackle climate change, which they say will protect the UK's national security and economic prosperity.
Mary Fallin, the governor, announced a joint pledge with John Hickenlooper, governor of Colorado, to stock their state fleets with cars powered by compressed natural gas (CNG), if America's carmakers will provide some more options.
The case has been further complicated by reports that Becker secretly met former group members in 2007 and signed a joint pledge to keep silent about details of the group's crimes.
The Vow, which was a joint pledge by the Prime Minister, Ed Miliband and Nick Clegg and designed by Gordon Brown, was offered to the Scottish people just two days before voters went to the polls to decide Scotland's future last year.
The leaders signed a joint pledge, published on the front of today's Daily Record newspaper, promising to give the Scottish Parliament increased powers and a fair share of resources but nationalists are still sceptical.
Even the most cynical campaigners conceded we may have entered a new era of climate-change action in November when America and China, the two biggest polluters, made an unprecedented joint pledge to make concrete reductions in their carbon emissions.
In another promising step, the county executive, Thomas Gulotta, a Republican, and the Republican and Democratic leaders of the County Legislature have signed a joint pledge to raise taxes if necessary to close this year's budget gap -- projected at $100 million to $200 million.
Nicola Sturgeon, Scotland's deputy first minister, says the joint pledge by Osborne, Balls and Alexander amounts to bullying on the part of a campaign panicked by the narrowing of the no camp's opinion poll lead.
